Michael Keaton is William Petersen in disguise

It's funny. Michael Keaton's role could have been handled by William Peterson (you know, the guy in "To Live & Die in L.A."). As a matter of fact these two guys could trade places at any time. They should have hired Peterson in Multiplicity he's that similar. Both have the same gait, the same general appearance, and zillions of other similarities to make them virtual doppelgängers. I know Michael's a tiny bit more out of his gourd, but Peterson can go way the hell overboard, too (as in "To Live and Die in L.A."). What do you think?