Austin Theory hasn't been seen on WWE RAW for several months and is one of several stars who are set to miss the SummerSlam weekend.Grayson Waller has been part of the recent episodes of RAW, where he revealed that he and Theory had split, and A-Town Down Under was now officially over. He also claimed that Austin was injured, which was the reason for his absence.However, Theory does have a reason to celebrate this weekend, since he celebrates his 28th Birthday on the day of SummerSlam on August 2, which would have been made a whole lot better if he were part of the show.It's unknown when Theory will return, since the company hasn't made any announcements regarding his injury or expected return date.Austin Theory still has a bright future ahead of him in WWETheory is someone many fans expected to become a huge star in WWE, given that Vince McMahon handpicked him in the same way that Drew McIntyre once was.This has obviously not been the case since Theory and Waller have been stuck in a doomed tag team over the past few years. It came as a shock that the group was split off-screen, as it seemed all the tension was building towards a huge fallout. However, it turned out to be a throwaway sentence from a backstage segment on RAW.The good thing here is that Austin Theory can now go back to being a singles star and doing what he does best. It's unclear where he will fit in or if there will be a WWE Draft this year, but if he is moved away from Waller to SmackDown, then he could be given a fresh start and allowed to compete for another mid-card singles championship.