In recent news, Pete Hines, Vice President of PR at Bethesda, has proclaimed that the Fallout IP belongs wholly to them, not Interplay, and that includes the rights to develop a Fallout MMO - something Interplay is currently doing.
"We own the rights to the MMO. We own the rights to everything Fallout. The licence is ours. Fallout belongs to us," Hines said to VG247. "Beyond that, I'm not commenting on anybody else's comments. It's a legal matter. A specific MMO or project or any of that stuff, the lawyers are all going to sort it out."
The statement comes as a response to what Interplay co-founder Eric Caen claimed last year, saying that Bethesda turned down any offer to make a Fallout MMO when they bought the IP in 2007.
Despite Hines' remarks, Caen told Eurogamer that Bethesda's use of the Fallout IP could be blocked if they refuse to let Interplay release the Fallout MMO - currently slated for release in 2012.
"We sold the Fallout IP to Bethesda in exchange for a certain amount of cash and the right to do the Fallout MMO," he said.
"If they refuse to let us do the game, then the sale of the IP is terminated, and they will be allowed to do only one more Fallout, 5.
"The original licensing deal was for three games and their DLC. So they already did Fallout 3, then Fallout: New Vegas, and they can only do one more Fallout, 5, if the sale of the IP is cancelled by the court."