Roman Reigns (worst case scenario) should be back in action by the Royal Rumble. Daniel Bryan should also be returning around the same time frame. Also, Batista will be returning for a run. This may be his farewell run with the company because at his age (he's 45 and will be 46 in January) he knows that his time is limited. Batista has said publicly that he wanted to do a program with Triple H as his farewell match at WrestleMania.
As noted earlier, WrestleMania could be Brock Lesnar's farewell if a new deal is not worked out. For more on the Lesnar story, click here.