not all because of ledger
Begins opened on a Wednesday, its 48mil 'opening weekend' isn't a good comparison for tdk.
A good amount of the increase can be attributed to Begins being a good film, and it also had a soft opening based on rebooting after franchise ruining batman and robin.
TDK was always going to have a bigger than average OW jump based on these factors. Ledgers death definitely grabbed alot of attention but to attribute all of the increase just to that is foolish
fifty shades will probably be R so i don't think its likely to be close to that high
I mean how could you even make a bdsm movie with a rating lower than R?
No bigger in the US, Spiderman has been doing 400mill+ international numbers since the early 2000's
Superman especially is way less popular outside the US than Batman and Spidey and batman needed to rebuild after killing the franchise in the 90's.
Like I said, Huge domestic, and I'm not saying it will do poor numbers internationally but it's not doing 7-800mill +++ like your talking about