WWE and Hulk Hogan are still negotiating a deal, reports PWInsider, and the two are said to be close to a deal. Creative is working on many different match and storyline scenarios for Hogan at WrestleMania 30.
The most recent talk had Hulk Hogan teaming or aligning with John Cena in some way. Hogan being in Cena's corner or Hogan and Cena vs The Real Americans are both possibilities being discussed.
It's also being reported that Roddy Piper might be brought in for WrestleMania 30. Hulk Hogan vs Roddy Piper is one of the only singles matches being talked about for Hogan. Other ideas being thrown around for Piper at Mania include Hogan and Cena vs Piper and another heel or Hogan and Piper tagging together to face Swagger and Cesaro.
Nothing is official regarding a Hogan return, but WWE seems to be operating on the idea that a deal will most likely be done in time for WrestleMania 30.