Superhero lineages and impact that should still be around in the Legion era.

[Thor-Ul]

Yeah, no Flash legacies in the current Legion, which is odd, as Bendis was already using Impulse in Young Justice when he started LOSH. If Bart's back, then wouldn't his cousin XS be back too? The timeline changes shouldn't affect her because she has a direct link to the present day through Barry and Iris, and we know she's back in existence because she appeared with the rest of the Flash family in Williamson's last Flash arc Finish Line. So it strikes me as odd that XS wasn't part of this version of the Legion.

I hardly doubt than Bendis would had any idea of who XS was.