Rovio tweeted a teaser image for their upcoming Angry Birds game, which it calls “a big adventure with new birds.” The company added some new birds and modified existing ones in their previous releases like Angry Birds Star Wars, but the tweet hints at some all new birds for the next Angry Birds release. There is no ETA for the game but expect a teaser trailer soon which will announce the release date for the game. We will keep you informed, stay tuned…