Sports stuff like soccer, bowling, hockey, ping pong, water polo and all that jazz would no doubt be implemented a bit further down the line, if at all. Would be cool to have at least one sporty type of gametype, for sure.
I think the idea of a relay race is really cool. Has a hot potato kind of vibe. We could start with a simple hot potato game mode first to see how it goes and then expand upon it if it appears to work well