Yun and Yang's Super Street Fighter IV Ultras

These dudes have some badass moves.....in the arcade!

The Twins Confirmed for Super Street Fighter IV Arcade

Yun and Yang! Event Hubs has a long report detailing all the changes (which may not be final) made in the arcade version. When I saw "long" report, I mean long. Longer that Dhalism's......ARM. The confirmation comes from Capcom's location tests for the cabinets. The video quality isn't that great but there's a glimpse of Yun below.