I also like to state that I'll be using the dub names for the movies, cause they're easier to remember and I like them better than the original names. You may choose whatever you like, this is just a preference of mine personally.
Also another note is that this theory takes in account that the entirety of TOEI's series, contradictions and all, is "canon." This isn't a thread discussing the manga or Akira Toriyama's work.
Let's overview the movies and OVAs, though I will be ignoring the Dragonball movies in this theory.
Movie:
Curse of the Blood Rubies - Alternate take on Pilaf arc.
Sleeping Princess in Devil's Castle - Alternate take on the first training arc.
Mystical Adventure - Alternate take on Red Ribbon arc.
Dead Zone - Before Dragonball Z, has a sequel arc to it. (canon)
The World's Strongest - Alternate take of post-Saiyan arc. Piccolo died but came back to life somehow?
The Tree of Might - Alternate take of post-Saiyan arc. Everyone is still alive.
Lord Slug - Takes place after Tree of Might, alternate take of Namek arc. Goku and friends never go to Namek (but rather, Namek comes to THEM!)
Cooler's Revenge - Possibly takes place in main series, due to Cooler's cameo in Dragonball GT. Probably in the three-year training wait for the Androids. (canon)
The Return of Cooler - Alternate take of the Android/Cell arc, takes place after Cooler's Revenge.
Super Android 13! - Alternate sequel to Android arc.
Broly - The Legendary Super Saiyan - Alternate take of late Cell arc.
Bojack Unbound - Directly follows up from Cell arc. (canon)
Broly - Second Coming - Alternate take on the pre-Boo arc and sequel to Broly - The Legendary Super Saiyan.
Bio-Broly - Alternate sequel to World Tournament arc, and sequel to Broly - Second Coming.
Fusion Reborn - Alternate take of the Fusion arc. Maybe in this Goku killed Boo when he first transformed into SSJ3. Takes place a universe where everything is canon, except for Cell (lol)
Wrath of the Dragon - Direct sequel to Dragonball Z (before the final timeskip), explains how Trunks got his sword in Dragonball GT. (canon)
Path to Power - Remake of the first two arcs of Dragonball.
OVA:
Plan to Eradicate the Saiyans - Some type of twisted universe where The Tree of Might, Lord Slug, Freeza arc, Cooler's Revenge, and Broly - The Legendary Super Saiyan are in a single canon and Cell arc isn't.
Yo! Son Goku and His Friends Return!! - Takes place after Boo arc, but before the final timeskip. (canon)
Now where is the "theory" in this? Well there isn't much, this is just a map of how I view the movies in how they are relatively in canon some form or another.
The theory comes from finding more deeper ties.
1. The inclusion of Icarus/Haiya Dragon in the anime and how alternate timelines work

Most people view this was an inconsistency, and rightfully so. But to me I think it's an opportunity for theory. I'll explain.

The first example here is Cooler, in which if you think about it spawns off around at most four timelines:
- Main timeline, leads into his cameo in Dragonball GT
- Timeline where Revenge of Cooler occurs
- Timeline where Plan to Eradicate the Saiyans occurs, in which Cooler's Revenge takes place after Freeza arc, which may place after Lord Slug
- Timeline where Fusion Reborn occurs
Timeline 1:
Saiyan arc
Freeza arc
Cooler's Revenge
Everything else
Timeline 2:
Saiyan arc
Freeza arc
Cooler's Revenge
Return of Cooler
Timeline 3:
Saiyan arc
The Tree of Might
Lord Slug
Freeza arc
Cooler's Revenge
Broly - The Legendary Super Saiyan
Plan to Eradicate the Saiyans
Timeline 4:
Everything
Fusion Reborn
Not only do we have Cooler's Revenge happening anyway, but the Freeza arc also happens in all of these timelines.
In a sense, Cooler and Freeza's story is linked directly to the ideas of fate, and I feel this explains how Haiya Dragon exists in the anime continuity. He still met Gohan before Garlic Jr. arc, but it was different cause there wasn't any Tree of Might or Tullece. This point however leads into another point...
2. Fusion Reborn

While my previous point constructed a view of "it's an alternate timeline unless proven otherwise" stance, this one is about unity. I'll explain the base of this theory:
Every movie set in the Z era exists in a single canon, supported primarily by Fusion Reborn.
Not self-contained in Fusion Reborn's universe itself, but rather, the entire set of movies exist in a single continuity that works alongside a slightly different version of the events that happened in the anime. Points that support this:
Lack of Cell

The only movie in the entire series that mentions Cell is Bojack Unbound, which Cell is a catalyst to his return. Cell isn't in Fusion Reborn either, and several stories seem to take place alternate to the Cell arc. Instead, Super Android 13!, Broly - The Legendary Super Saiyan, and Plan to Eradicate the Saiyans happens. Maybe Bojack was considered "dead" when he was sealed by the Kaio, like in some Japanese mythology.
I think, however, that maybe a "lack of Cell" is too strong. While I'm saying Cell didn't exist in this theorized timeline, it's possible that he does...even in his Perfect form, and the way he was defeated (causing Bojack Unbound) could still happen, but the events that lead to it would have to be drastically different.
Bio-Broly -> Fusion Reborn

This may be pushing it, but I feel like it's probable that Bio-Broly leads directly into Fusion Reborn. Goku is directly told to take care of Broly who is terrorizing Hell, possibly explaining why he doesn't appear in Fusion Reborn (since his cameo would probably overshadow Janemba). You can use the argument that since they used the dragonballs in Broly - Second Coming that they can't use them later in Boo arc, but if my idea of how Fusion Reborn fits in is correct (Goku killing Boo himself the first time they fight) then I think it works pretty well.
If we can connect Bio-Broly with Fusion Reborn, one could also connect the other Broly movies and Plan to Eradicate the Saiyans to Fusion Reborn, making them possibly in the same continuity.
Fusion Reborn cameos

Just going by Fusion Reborn itself...the following timeline for it should be this:
Dead Zone
Saiyan arc
The World's Strongest
The Tree of Might
Lord Slug
Freeza arc
Cooler's Revenge
Broly - The Legendary Super Saiyan
Bojack Unbound
Boo arc
Fusion Reborn
This, however, is going by a single movie and it already encompasses a good portion of what we have. Now let's add in the missing pieces...
Dead Zone
Saiyan arc
The World's Strongest
The Tree of Might
Lord Slug
Freeza arc
Cooler's Revenge
Return of Cooler
Android arc
Super Android 13!
Broly - The Legendary Super Saiyan
Plan to Eradicate the Saiyans
Bojack Unbound
Broly - Second Coming
Bio-Broly
Boo arc
Fusion Reborn
Wrath of the Dragon
In the above timeline, everything is fitted together. If you think of it only in terms of the movies, there is virtually no contradictions to them leading into each other with alternate events from the main timeline still taking place.
I emphasize the alternate aspect, clearly alternate events happened in some form or another here even in the movie's own continuity. I don't think that's really debatable at all.
However what I am saying is that I think it's probable that all the movies share the same "alternate" events in some form or another, with or without Cell. Even Wrath of the Dragon has a lack of Boo, which would tie into my idea that Fusion Reborn really does take place where Boo was killed by Goku.
I'd like to hear people's thoughts and ideas on this, and how exactly they think the movies fit.







