According to ProWrestling.net, Hulk Hogan's long-time agent Peter Young signed a deal back in 2008 with THQ, the original makers of the WWE video games franchise. The deal was for Hogan's character to be included in a THQ-made WWE game (likely "WWE Legends of WrestleMania", as "WWE All Stars" was not in production until 2010), and the contract included a renewal agreement that was picked up by 2K Sports when they purchased the rights to the series from THQ earlier this year.
Young continues to claim that Hogan has not signed any sort of new contract with WWE or 2K Sports, backing up earlier statements from Eric Bischoff, and that they simply cashed in on an old renewal agreement to make the upcoming "30 Years of WrestleMania" mode possible in WWE 2K14.