Bit early to start this one I know, but I heard something interesting* at the weekend so thought I would relay it here
Current FIFA rules are that if your Confederation hosts a world cup, then it is barred from bidding to host the 2 world cups afterwards. We know that FIFA chose to award the 2030 world cup to Spain, Portugal & Morocco as hosts and then added some centenary games in South America, but they have since confirmed that South America is an official host of 2030, and they did that on purpose to exclude them from 2034 so that FIFA could give that one to their Saudi mates.
That all means that for the 2038 World Cup, the confederations of UEFA, CONMEBOL (south america), CAF (africa) & AFC (asia) all can't bid to host. This leaves only OFC (Oceania) & CONCACAF (North America, Central America & Caribbean) available to bid.
Australia left OFC some time back and are under AFC, so OFC's FIFA affiliated nations are just New Zealand + 10 pacific island countries. I think OFC as it stands is highly unlikely to host.
This would then leave CONCACAF as the only serious hosts, but the 3 North American countries would have already hosted just 12 years earlier, which is fine under their rules but is somewhat unappealing.
so, are we set for another North America WC or will we see a Central America & Caribbean island hopping one? (or FIFA just change their own rules)
We will find out in 3 or 4 years!