Hmm.... you can't combo traps into themselves, but you can combo them into each other. So you can do something like blah blah Net, blah blah Ice beam assist, juggle, etc.
Or you can do blah blah Net, blah blah juggle, tag in, ice ball, blah blah, and not spend meter.
It's pretty interesting. It seems like for these reasons, trap characters become a lot stronger in tag team, and overall the two sub zeroes seem to have the most utility in their assists. Quan Chi also has a vertical unblockable beam, but combos aren't quite as free off of it.
Is there a character with a quick fullscreen move that leads to full combos? Kabal, maybe? Seems like it would be good with Saibot's block disabler.
Teams that look interesting so far to me:
Cyrax/Sub Zero - fantastic zoning team
Cyrax/Sektor - another fantastic zoning team with ridiculous juggles
Quan Chi/Sub Zero - This is really for buffing the shit out of quan chi and giving him free life back
Kabal/Noob Saibot - basic reset team
Sonya/Noob Saibot - basic reset team
Smoke/Reptile - this team will fuck up people's shit, no joke. I just thought of it right now, and it's kind of stupid. Reptile's Yoga catastrophe assist with an invisible teleporter? come on now.
Nightwolf/Reptile is probably pretty good, too.