VideoGamesUncovered has caught an interesting tidbit from the twitter account of Erik Dellums*, Three Dog's voice actor, concerning the return of the radio DJ in some form. Apparently Dellums has been given permission to release that tease, meaning that this could be the start of a viral campaign.
For what? Now, assuming this isn't just an elaborate fake, this could be a tease for Fallout 4, which would mean that the title will most likely take place in the Capital Wasteland or in some nearby area (given that it's fairly improbable that Three Dog could have traveled further than that), some kind of spin-off, either in terms of media (improbable given Bethesda's protectiveness of its own IPs and reluctance to publish stuff such as toys, comic books, etc.) or video game (something similar to New Vegas, using Skyrim engine but not quite being a generational leap, though I see this as even more improbable than the other option). There are probably other options I'm not considering too, but for now that's all I could think this could be related to.
* While Dellums' Twitter account is unverified, the chances it's a fake seem slim at best. It also should be noted that plenty of Twitter accounts are also unverified, including Brian Fargo's and Chris Avellone's.