Mega Man's prologue from Street Fighter X Tekken has been revealed, chronicling the beginnings of the old man's journey to acquire Pandora. Roll makes an appearance, too. She's a bit, uh, different from what we're used to. Watch and see for yourself.
You gotta love the physical contrast between the two: one's tired and stubby, the other is beaming with youth and glamor. An interesting design choice, to say the least. I certainly wasn't expecting that.
Also, might I add, the cutscene has a few allusions to Mega Man Legends mythology. Mega Man's character bio hinted there would be some nods and it looks like they followed through. "Treasure hunting" and an "ancient man-made satellite" harkens back to two dominant plot elements from the series. Even Roll's personality seems to borrow some elements from her Legends incarnation... you know, the whole assertive thing.
But I'm not complaining. Not in the slightest.
EDIT: English version added. Enjoy!