2) Earth-3
We already know that the Multiverse is made up of Infinite Earths, so Jay Garrick hailing from Earth-3 probably shouldn’t have come as too much of a surprise. However, assuming that’s also where the Justice Society hails from, its existence opens the door up to a wave of new characters making their presence felt in The Flash.
[zergpaid]Once again, we could meet the doppelgänger of characters like Barry, Cisco, and Caitlin, and seeing as multiple comic book reboots means that there are several versions of pretty much every DC Comics hero and villain, the show could take us in some very new and unexpected directions when we get to meet them. There’s definitely a lot of potential here, and we’re hoping that the writers don’t ignore it.