For months, WWE has been discussing ideas for Dean Ambrose and Seth Rollins to be called up to the main roster and compete on Raw or Smackdown. According to several sources, they are still deciding how to debut these two future stars. Ambrose and Rollins are considered to be the top two future superstars, and have a lot of stock put into both of these guys for the long haul.
Seth Rollins currently holds the NXT Championship title, but has been talk of him dropping it before the end of the year. It is being said that as soon as he drops the belt, he will immediately be thrown onto Raw or Smackdown. As for Ambrose, they are still looking for the right person and right feud for him to begin his WWE career.