Any Custom games ideas?

Wanted to make some more custom games later and needed some ideas i was planing to do a slayer map but open to any subsections.

I Recently made a map called mantis pit it is 1v1 mantis map but houses 14 players in spectator booths and randomizes matches it can be found on my file share.

Well with me i like attack & defend, Death Races and scenarios. Those are the one I build