I am only posting this because of the James Bond idea. It makes as much sense as anything else at this point. My idea was they should have tried something like Dr. Who way back with George Lazenby, and have some super secret machine that altered the spies' appearance. Thus giving a reason (sure an insane one, but, like the man says, have you ever seen Moonraker? They have surely already done insane.) but still a reason. The code name one works just as well. Of course, there's nothing in the original Ian Fleming novels to suggest anything like that, but since we are about 20-something films deep into the Bond series then it would probably help to explain a lot, even if it happens to be just sort of something that people have come to expect as the way it is.
Of course the Ferris Bueller one is a joke started by the internet. And Matrix:Reloaded or Revolutions are not great movies at all.