I think it's fair to assume that barring deep runs in the playoffs (assuming that he is playing very well) that his contract would come in somewhere in the ballpark of 2/3-3/4 of the Russell Wilson deal... That being said, there is some restructuring of Mario's deal that can be done. Unfortunately, Glenn, Gilmore, and Dareus are all big pieces to this team with no foreseeable replacement on the roster so re-signing those guys is a priority as well.
You also have to think about EJ.... Certainly he is going to want to start somewhere, so at the end of his deal, assuming TT is the starter, EJ's gone... I have to say, though.... I'm much more confident in this FO now than I was a few years ago.... It almost seems as though they have a plan....