Wilson has been turning up in too many movies as the charming, deadpan co-star for us to be charmed anymore, while Murphy must play something other than that smart -
aleck motor - mouth character if he has to be funny again.
Mr. Downey's Iron Man / Tony Stark character has ingrained in movie goers his
motor - mouthed smart -
aleck persona that fits very well with the lacking - a-conscience cocky defense attorney who only defends the type of white collar criminals who can afford his unmatched courtroom savvy.