Since a Sony spokesperson has already reaffirmed, "We have not offered any roles to anyone nor are we negotiating with anyone", we should treat this latest bit of exclusive news as a nothing more than yet another rumor.
What's much more interesting to me anyhow is that shooting for Fincher's remake is reported to kick of this October, right around press rounds for "The Social Network". That actually sounds plausible and has been mentioned in enough other places before that it may just be true.
I guess we'll see what happens. At any rate: This fall will be Fincher season!