It should beat Titanic, given what its done already (in terms of gross revenue, not tickets sold)
Its hold, worldwide, has been nothing short of Wii Play. It has had 3 weekends of ~200 million USD, worldwide.
I'd give it a 60% chance it beats Titanic. When IMAX/3D tickets cost >$14 worldwide, how could it not?
BTW, its cume stands at...
France ($21.3 million on the weekend for a $84.5 million)
Germany ($12.3 million, cume $57.2 million)
Spain ($10.1 million, cume $47.1 million)
U.K. ($9.3 million, cume $53 million)
Back from the dead, I'm afraid.