Possible game mode

I was thinking about a version of League where to win you would need people to enter the opposing teams nexus and the game could only be complete once all 5 got inside. Maybe a couple time limits on how long you could be in the nexus before being put back at your base or something. Could be cool and more strategic if you had to risk going in the nexus and putting your team down 4v5 or something like that. Idk just seemed like a cool idea.