Wait, what? I still don't know about that. I mean, if everybody really wants to, we can, but I still think that was partially the reason the last one slowed down. Besides which, if you make it in space, the only difference that really makes is the background. The majority of the layer 4 tiles will be the same.
Perhaps we'll go with Jungle Temple for now, and add space if we really want to when the time comes for backgrounds.