With both Mel Brooks and Buck Henry still alive, I can't believe that this movie could really be written by a duo other than them -- not that I think they'd write it. I just simply can't imagine that it will have any of the zany tone that the TV show had. That said, I am pretty happy with the casting so far. I can't think of a better pair than Carrell and Hathaway to play the characters originated by Don Adams and Barbara Feldon, respectively. They better not mess it up with whoever they get for The Chief.
I guess there's not much chance of the movie being as bad as the '90s Get Smart series starring Andy Dick (and Adams and Feldon) nor could it be as awful as the Inspector Gadget movie (the cartoon was like a spin-off of Get Smart and featured Adams' voice).