Cell never reached his Perfect form and no Saiyan reached SSJ2 form, so Babidi never went to Earth and probably never found anyone strong enough to revive Buu. It's a non-issue for Future Trunks.
On the other hand, Beerus should still hear of Freeza's death and look for a Saiyan expecting to find the Super Saiyan God, so when there's only Trunks left, he should blow up Earth in frustration... Unless Whis realizes soon enough that Goku is dead and doesn't bring Beerus to Earth at all.
But I just don't think the Future timeline will ever be relevant again.
If I struggled to the end of my determination, to the end of my way of life with my followers, if the result is ruin, then this ruin is inevitable. Grieve. Shed tears. But you cannot regret.