Gamemode Concept: Time warp

Not really sure what to name this but here it is.

The gamemode would work as the standard 5v5 summoners rift map but, all older champions (or maybe only some) would revert to the state of gameplay where their kits were the most different from their current kits and at their strongest.

Example: TF when his kit was in the stage of having his global tp on his E and global slow and vision on his R.

The reasoning behind this is that there on millions of players including myself that will never get to experience what league was like in time of its alpha and beta as well as the couple of years following its release, so since so many kits sounded so cool despite being broken it'd be nice if we got to play with them, and it being a temporary gamemode meant for fun, champion balance wouldn't have to matter.