A friend had an amazing idea for Nexus Blitz
If riot are gonna go and add back a lot of the old items which were removed from the game, why not also go back and add in the removed champions from the game? Every major reworked champion, or now reverted, added into a single game mode as a different champion. That way you can actually put the two versions head to head, or side by side, and see how they've changed and still get to play both.
Allied team.
Enemy team.

[sg-miss-fortune]