Pandora Mode is where you can sacrifice one of your characters for a power boost (X-Factor)

Online Training Mode

2 VS 2 online mode.

edit: Video of Pandora Mode

http://www.gamersyde.com/stream_street_fighter_x_tekken_gameplay_sf-23491_en.html

These things, more than any character reveal, have sold me on this game.

Pandora mode is a sign of Capcom learning. Comeback mechanic with a detriment, now its just a matter of whether or not its as good as X-Factor level 3.

Whoa Pandora Mode sounds serious. Plus you look all awesome.

http://www.eventhubs.com/news/2011/sep/13/pandora-trailer-street-fighter-x-tekken/

Wow, the camera angles on Ibuki's and -that other dudes's-* special attacks are impressive and get me all excited.

*I haven't been keeping up with this games character reveals and I don't know many older Capcom characters.

I can't wait until I can play as Sagat/Steve, please be good...

When I first saw the Pandora feature, I scoffed at it, but later became interested in it.