"Bandle City Beatdown" - New rotating game mode idea

I'm sure this has already been an idea that has been expanded upon at Riot or maybe in the boards before. The title is kinda self explanatory. Rotating game mode and the only playable characters are Yordles. So a game mode with these champs would seem pretty fun honestly. [Amumu's state as a Yordle has not been expanded upon so he might be omitted officially.] [Fizz isn't noted as a Yordle either but was confirmed to as sharing a genetic connection with them.]

The Y.U.P. (Yordle Unification Pass) brought the Yordles and Meglings together, why can't a game mode do it too! Another note for Hilarity, possibly make Tahm Kench take the place of Rift Herald/Baron since he's "Rivals" to all of the Yordles! Maybe even Poro skinned minions? Extra fluffy cuteness.

[TL;DR Game mode with only Yordles as pickable champs.]