Earlier in the week, we confirmed that Rovio Mobile is preparing to release Angry Birds Christmas edition for iPhone, iPad and Android. However, that’s not all that they have in store for us. Rovio had hinted that something else is in the pipe. We speculated that it might be the arrival of the “Mighty Eagle” on the Android. However, now it seems that it might be something entirely different.

Yes, Mighty Eagle is scheduled to make an appearance, as soon as Google gets its Market sorted out and enables in-app purchases. However, that is definitely not the big new thing Rovio is preparing for. It isn’t the console ports of Angry Birds either. TechCrunch Europe had speculated that Rovio might be working on something disruptive.

We can confirm that it is something that Rovio believes will be a big deal. Their exact words to us were, “There’s another REALLY big and new project underway”. Rovio is working on its own gaming network (think Xbox Live or Open Feint). However, that won’t be ready by 11th December, which is the Angry Birds day, and the date on which Rovio is expected to make the big announcement.

So exactly what is Rovio Mobile working on? They won’t tell us. However, it’s definitely not a new game, or mighty eagle for Android, or even Rovio’s gaming network. Let the guessing begin. What do you think Rovio is working on?