Hulk Hogan is not signed as of right now but people are talking confidently about the idea he would be with the company and involved with the biggest pay-per-view of the year (WrestleMania)in some form. However, it is openly believed and talked about internally that Hogan is not expected to wrestle.
There's a feeling that even if officials wanted him to wrestle, he could not pass medical tests. Hogan most likely will not be teaming with John Cena and will likely do something like an appearance, a quick knock down to a heel and a promo.