Well right now we are essentially waiting for more infos from Cyan.
There are a couple of ideas floating here about how a new game could be created to succeed to MOUL, or at least to pick up where it left off.. It would be an online game sort of similar to Uru but open to explorer-created Ages, it probably wouldn't deal with the D'ni story itself though (as Cyan probably wouldn't allow that). It's still a bit vague at this point.
The 'problem' with that is we need Cyan's agreement, and recently they have hinted they want to help keeping Uru alive in some point (maybe run their own server) and help with custom Ages, but this all need to go through Gametap first.. So they are waiting after GT and we are waiting as well.

As soon Cyan gives us more info, then we will know what we can do. If they run their own Uru server and open it to custom Ages, then we'll probably keep cranking Ages. If they don't then the ball will be in our court.