Board Thread:General Discussion/@comment-5313287-20140913001904/@comment-24172144-20141003032603

We don't even know that what occurs in Futures End will remain canon in the future, especially after whatever happens with Brainiac gaining access to Vanishing Point. When he does, the changes to all of time will be catastrophic and may result in the permanent retcon of all of Futures End.

This is all speculation, mind you; I don't know for certain nor do I claim to know what's going to happen, but the most we can do is pull facts from the comics and see what happens.