What if Riot were to work with Arc System Works to make a League fighting game?

Yes, I know about League of Fighters, but that's not being done by a professional game studio. Team Instaburst is a small crew without any prior releases.

Watching a lot of Blazblue, I thought "What if these guys made a LoL-based fighting game?"

Now, before you say "COPYRIGHT!", just humor the idea for a moment. Imagine a fast-paced fighting game by the guys behind Guilty Gear, starring Champions like , , , , , etc. Tons of combos, counter-hits, super moves, and flashy finishers (think of Vi piledriving someone into the ground and leaving a huge crater).

Now that would be fun!

Don't ask me how it'd work mechanically, though. I was never good at Street Fighter and the like.