New Game Mode?

I was thinking of game modes and something that would be really unique. I think it would be fun to have a game mode called Roll The Dice. Basically it's a game mode taken place on the Rift where you have normal picks and bans 5 v 5. But the catch is everyone's ult is uncertain. (Roll The Dice). Ultimate abilities would be on a set cool down time (say 60sec) but when the 60 seconds was up after using an ultimate it would randomly shuffle the ultimate within your team. So say you have an Annie Mid, then all of a sudden her ult becomes Malphites ult and so on and so forth. I think it would be really interesting to see and force teammates to work around th changing ults and how they build the champion. Thoughts? Ik it's a lot.

TL;DR: Ultimate abilities randomly swap between teammates on a set timer. Chaos. Fun.

Up vote for agreement.