I think a fun idea just for a small map for maybe 12-16 people would take the ModHunt Map and be able to play in that. Or maybe modify an Archi build or the Survival Spawn into a map.
It would kind of ruin the whole idea of ModHunt, personally. The idea of an archi build would probably fit more along the lines of a Super Craft Bros map. I do like the Survival Spawn idea though, maybe even Crynia in ruins :3