#4 Far too soon to do this match
When the Seth Rollins vs. Kofi Kingston match began in the main event of WWE RAW, the commentators, especially Corey Graves. made mention of the fact that this was a huge match indeed. In fact, this was a match that had the potential to main event WrestleMania next year. In a way, it was a hint that this match will happen down the line someday.
In any case, even when The Bar interfered during the course of this contest, Seth Rollins assured Kofi Kingston that this match would happen somewhere down the line. I'm sure the seeds have been planted and fans really want to see it take place. The chorus of boos that sounded during the match is a great indication of the fact.
Will it be a title unification match when it eventually happens? Maybe not, but it'll certainly be quite a big deal.