Bungie hasn't said anything about it. Keep in mind that independent game development is by no means a linear process, and it can often take several failed game concepts to discover something that works. It's nice that Bungie had Crimson lined up for release with Aerospace, I just don't think they had anything else in the pipe as it were. I would like to think that it exists though, as a Computer Science student I think it would be cool to have that sort of resource around for when I graduate.