I don't think Mars After Midnight is going to be "like" Obra Dinn. Pope's said himself he wants to work on something much smaller in scope, and given the whimsy of what he has so far I don't see it growing into something like Obra Dinn.

As somebody who wants no sequel more than Obra Dinn 2, I don't think this is it. I always look forward to seeing Pope's work, though, and I hope he's working on something that he enjoys.