I think the best way to add tension is if the film's in danger of being shut down. Maybe it's going over budget, maybe it's stirring up too much controversy, maybe there's litigation issues. Frankly, I don't see those occurring with a Bond film- everyone loves those, they get huge budgets, and the rights are pretty well sorted out.

Maybe the script deals with a topical issue, like the War on Drugs/ Terror? Maybe it's critical of certain policies and figures and the studio is balking at that?