Well looks like the other two have been
de facto decided without much in the bid process (2031 going to the United States and other CONCACAF members and 2035 going to the United Kingdom) so we could start speculating on who would host 2039. I have no clue if hosting restrictions would be enforced, so some of these bids could be rendered ineligible by the time the bidding process starts.
Currently we only have two interested bids.
Japan:...
Candidates to host 2039 WWC