That would be interesting too, but I think would require more time and resources away from whatever else they have in the development pipeline. They already have all the relevant data they would need for progression, so if classic can sustain itself it would be less of an issue. Alternate timelines could be really interesting for developing ideas they scrapped, like the naga race that was rumored iirc. Also, with all the tech advances they could take the new timelines into some groundbreaking territory. Would they be motivated to do it? Would they do it well? Idk, but either path has its pros/cons.