In a recent tweet team ninja explained the trailer new additions to the series. These moves are called power blows and cliffhanger. The power blow is when we see time slow down before you launch an attack. This so that you can choose which danger zone you want your opponent to land in. The cliffhanger is what happened to Ryu towards the end of the first round. According to the tweet this will dizzy the opponent allowing you to get a moment to knock them around again ike we saw in the trailer. Keep in mind that this is the pre alpha version so things may change as the product come to completion