Good predictions But i think TA2 could increase in some develop markets as it was big but not huge in some markets and is very well loved like the UK for example.
I think your Avatar 2 prediction is very good but i think drops in major develop will be harder like 30% or more but thanks to developing markets it will make a similar amount OS.
Yh to optimistic what would it be TA 2 $1.6 billion and Avatar 2 $3.8 billion? Can't see that i think avatar 2 will drop heavily in developed markets but thanks to a bigger international market overall it will gross similar amount to the first OS and ww IMO.