Potential New Game Modes

My friends and I have been discussing about a potential new game mode that could be added into the Rotating Game Modes. The first game mode that we think riot should include is the Hide and Seek on Crystal Scar. The game consists of 2 rounds, each side is given the chance to hide and seek. In the rounds, players who are hiding cannot kill the seeker and only have 7 lives, they are also not allowed to play any champions that are invisible and cannot go back to fountain. We believe that each round should last about 15 mins. The second game mode is played on Summoner's Rift. In this game mode, we believe that the game should be based on old champions. For Example, the old Sion, or the Old Karma and so on. This is just any regular game but it allow players to experience the first work on the champions.

I thought it would be pretty cool. Any other ideas?