Nexus Blitz is the one map where I felt like old champions can make a return

I mean seeing as how we're returning back old items, especially the "I'm lazy so lemme one-shot you" Deathfire Grasp, I don't see much problem in having old champions making their return.

If that were to happened, make it so that there's 2 champions available, for example: Sion(old) and Sion(current). Another example for the likes of Ryze: Ryze(1), Ryze(2), Ryze(3), and Ryze(current).