Indeed.
Not to mention, that in terms of increase percentage, CATWS increased more from its first movie than TTDW did from its first one, including on the overseas market.
Also, in a majority of european countries where it started significantly lower than TTDW (Thor's main overseas market is definitely Europe while CA is South America and China), it was able to reduce significantly that gap through its run.
The thing is, CA has built a bigger momentum, goodwill and franchise recognition to increase even more on the third one...in every single market. His leading role in AOU will cement that even more.
To me it has the best chance to hit $1billion on its third installment with something like $320M domestic and $680M abroad, which is definitely possible in 2016.