The Super Saiyan God prophecy in the future timelines

[Yuji]

We are meant to believe the Oracle Fish prophecies are absolute. Considering the original SSG prophecy is made before the timelines split, this means it was made in the Trunks and Cell timelines as well. If so, who does Beerus fight, or when? Beerus eventually ends up dying (at least in Trunks', no idea about Cell's) and there's no SSG showing up at the specified timeframe (which should be somewhere around where future Gohan dies).

[Rafa Fast]

What if he actually never woke up or took longer to wake up in these timelines? (Just a hypothesis, not sure if it was really mandatory for him to wake up during the BoG period)

[Grimlock]

It seems that, in Dragon Ball, history is already written. Oracle Fish "predicted" Beerus would fight because it was predetermined. Trunks/Cell going to that timeline was supposed to happen. In the timelines where Trunks/Cell didn't appear, Oracle Fish didn't have any premonition at all.

Well, that's what I think. And it is supported by the fact that Trunks didn't know Beerus until he traveled to the present once again, which obviously means he never showed up in his timeline when he was supposed to (AGE 778, that's two years before Gohan's death).

[TobyS]

The trouble is, Although we know alternate timelines are only created when there is a sufficiently large paradox and not just any time travel backwards, this would cause problems.

If we assume any timeline where it's not possible, the fish doesn't make the prediction that'd mean the prophecies addition (or removal) would change the timeline before the time travel that caused that took place.

In other words Beerus only slept when he did, for as long as he did, because he got the prophecy. His staying asleep or staying up and destroying whole planets and doing his job would fork the timelines an additional time but it didn't....

I think it's funnier to assume the fish is wrong everywhere else, and it's touted accuracy is just confirmation bias in the new main timeline