The team continues to state that they don't plan on minting any other land for Splinterlands. I'd say they are about 99% committed to keeping their word on this. Although, they have mentioned that if they were to ever add more land, it wouldn't be in Praetoria, and whatever new land was to be introduced, it wouldn't have nearly the same value/utility as the current land would.

Lastly, the team has mentioned that they do want to create new games beyond Splinterlands that would have a land economy as well. Again, this wouldn't affect Splinterlands in any way though.