What is this?
Avengers: Endgame fans coming to terms with Avatar remaining the top-grossing movie
Avengers: Endgame Is Now Less Than $25 Million Away From Toppling Avatar's Record
Predictions here make me optimistic but reading everywhere else it’s like the battle is over and Endgame already lost.
Endgame has 10 years and 22 movies behind it. I don’t believe we will see anything close in this age and not even Avatar 2. That’s why if Endgame didn’t beat the record now it’ll never be beaten.
to answer your question, I think 2bill is the maximum a movie can make.