Because from Garlic Jr we then go to Tullece then Slug and somewhere in this mess we need to put Dr. Uiro Storyline. We then have Freezer then Cooler and Metal Cooler with the Android 13/14/15 then Broly (and his 2 others movies) and Hatchiyack that fits into the Arc Cell. We then have Bojack before the Buu saga and without forget Janemba and the almighty movie with Tapion.
Here is my basic idea for incorporating the Oavs within the original narrative of Dragon Ball and its History.
For Slug in my opinion I think it would make more sense if I associate his arc with Frieza Saga and make all the battle set on Namek. I see Slug as a mid-boss. My idea is that he will stole Earth Dragon Ball have his youth back and then Set to Namek for having the real deal, the Namekian Dragon Ball. In this Arc Goku, Vegeta, Gohan, Piccolo, Kuririn, Yamcha, (Raditz) and Tenshinhan will be in the party. Choazu will be dead on Earth as well as Kame Sennin.
For Dr. Uiro did I combine his story within the Cyborg Arc or with Garlic Jr second Arc ? Tell me which choice is Good ? Of Course it's a Fan Project so bear in mind that I'll do some change in character for certains characters and will obviously not follow to the letter each story.
Now we arrive at almost at the Cyborg Saga but before that I will and I think it will be good combine two movies into one Arc, After Mirai Trunks deliver his message to Goku during the first year of training Goku & Co will have to dealt with Cooler but with a twist here, Paragus and his son Broly will be pursued chased more HUNTED by Cooler, (Exit the Legendary Warrior, Broly will be a normal Saiyan heck a coward/shy one seeking only his protection Father)
After the 3 Years of training then we will have the Android/Cyborg Saga I think I will first introduce with Android 19, the Android 13, 14 & 15 Gero will be there too but as a Master Mind like a pupet master. Then after the demise of those Cyborg everything occur as its should until the Demise of Cell. For Bojack and his story I think I will make a change on who the Hero is.
For the Majin Buu saga did I open a second battle field in Hell with Janemba here Janemba will be also a Majin in my story and our Heroes reinforced by the addition of Broly (Perharps Raditz) would be able to fight two front ligne at hand. After this Arc I think for Hildegarn that I will combine Tarble in the mix but exit Gure as his wife, Tarble will be from Konats and have their outfit. Abo & Cado will be sidekick for Hoi and his scheme.
Of course again Bear in mind that this GT will be nothing like the original one, you have to know that Beerus will be in the background somewhere and that the Zen'Oh are still there.
I will combine Hatchiyack story idea with Bebi Tsuful Arc and also add The Big Gete Star all of that together. I will Replace Super Android 17 as a vilain by the Almighty Ozotto as a Majin and he will create havoc on hell and on the entirety of the Univers. As for the Black Star Dragon instead of being a fight only occuring on earth the fight will be Universal with New Namek (Again I know) at the end I need to power up Yi Xing Long with the Namekian Dragon Ball for Obvious reason.
Also, the Super Saiya-jin 4 will be present but different, Android 17 and 18 will be both becoming Super but here thanks to Bulma works.
I will need after Kuriza as first Vilain a good read on the Online Story and the introduction of Towa and Mira, a good read of Xenoverse story from the two games and also a good read on the story in Heroes.
P.S and Disclaimer: I am not seeking to compete on The-Devil-Corpse project because my project is built on taking freedoms and changing drasticly the personalities on certain characters like Broly and Raditz. And perharps I will add my own Dragon Ball stuff into this mix. The-Devil-Corpse is trying to be close to the original material as much as possible, which I believe is possible but so much more complicated and exhausting to do. @The-Devil-Corpse if you come to my topic and read it you have my utmost respect in your project.