power plant
maybe there could be a powerplant stage that was once used by onagas armys. it could be all abandoned lookin' and there could be a part were you could be knocked out of a window in the generator room. there you could be knocked into the generator and be electricuted until the character explodes, discentigrates, frys ect.
cotton field
this stage could have a moving death trap. there could be a tractor on the field and you could be knocked into it and be shredded up and stuff like that, or there could be pits where the character could fall in and the tractor will fall in and crush the character.
those are just a couple of cool death trap ideas that i could think of that would be pretty neat to go on mk7. put whatever you think would be a great deathtrap, not a stage, a stage with a death trap on it.