Lucasfilm has registered a number of new trademarks, including Star Wars: The Old Republic, The Old Republic, Star Wars Legends, and Star Wars Sagas. This news is interesting as is, but it gets really juicy when you read the type of patent and its description: "Entertainment services provided on-line by means of global and local area networks, namely, providing interactive computer game software, interactive video game software and interactive computer games and interactive video games, all on-line by means of global and local area networks ... "
That sounds awfully MMO-like, doesn't it? It's not even remotely conclusive though. It could be another kind of multiplayer, or it could even be some kind of web-based community service connected to a single-player game; the patent description suggests that it's also for news and "fan club services."
That said, it could be the fabled, BioWare Austin-developed Star Wars: Knights of the Old Republic MMO. We suppose it all depends on just how badly you want to believe!