There giving us new challenger videos! when??
Well, they've given New Challenger videos for every character outside of the first eight (the first six because, well, they were first, and Drake/Big Daddy because they had the special E3 reveal), even when the reveal was spoiled (Gamespot with Raiden, for example). I'm going with an assumption, but considering the New Challenger videos were well received and show off the characters very well for a short clip, it's one that I'd call safe.
No, towards the game release they finally decided to make New Challenger videos for the first 6 so it's just Drake and Big Daddy that never got them.
Oh, **bleep**, you're right. I completely forgot they did that! Good catch. So yeah, it's probably gonna happen for Kat/Emmett, then.