This will, of course, degenerate into a fruitless debate about the effects of the shooting vs. the Heath Ledger factor in attempting to explain the overall runs of the two films. Personally, going off a conservative 180M OW estimate, I see this hitting around 500M. WOM, even if it's generally accepted to be a bit beneath TDK, will still be excellent and should help this along. The loaded upcoming release schedule won't however.