Worm hole environments could be something like voids, like have chunks of things such as tiny islands, chunks of spaceships,space stations, etc that the player would be able to walk on or w/e while making their way through the wormhole or if becoming trapped in it.
I think it would be cool if like Little Big Planet Worm Holes took you to another users planet randomly. Would be a good way to make new friends and feel like a real space expolorer. Land on the planet and be like. "We come in peace." or be like "We come to blow you to peices" of course you can turn off if you dont want to be in the random worm hole lol.
Don't forget that certain races have another race as their biggest enemy (Like a Hylotl hates a Floran because the Florans pushed em off their home planet.)
No way, it should have half spheres littering its side panels. A death ray and a suction cup to suck people's faces off. It should also fly around screaming EXTERRRRMINAAATE! totally original `_`