I wouldn't be so hasty. World has a chance at Avatar's domestic, depending on legs. By the end of this weekend, World should be almost 200 million ahead of Avatar. Difference now is Avatar had out of this world legs. Legs that should make up the 200 million difference, but it's too early to tell.
World should handily beat Avengers 1 though. World has been separating itself during the weekdays and is now about 30 million ahead of Avengers 1. Avengers 1 ended its domestic run at 623 million. Avatar ended at 750 million.
My guess is World will end up somewhere between those two numbers.
Is it me, or are Inside Out's midnight showing #'s kinda low? How do animated movies usually do in that timeslot?