Rovio is planning to debut a new game in its Angry Birds series, entitled Angry Birds Go. Created in partnership with RedBull, the game was first teased in mid-June with a website that featured a bird dashing down a pathway.
Angry Birds Go is unlike Rovio's standard Angry Birds games, which focus on physics-based puzzles solved by flinging birds at various structures. Instead, the game appears to be a kart racing game. As noted by our sister site TouchArcade, Redbull has a multitude of racing games in the App Store already.
The specific game mechanics are unclear, but it does appear that players will race karts against each other. While the video teaser does not mention a specific release date, it does say "All will be revealed soon!"