Forgot to mention that the CW's version of Crisis on Infinite Earths is this year and I'm so here for it
.
Apparently, Brandon Routh (Ray Palmer/Atom in Legends) will ALSO be playing his version of Superman (from Superman Returns) and I've also heard Tom Welling is making an appearance
. So including the Superman from Supergirl, there will potentially be a 3-superman team up.
It's also just awesome to have Smallville be a canon alternate reality in the CW DC.