Twitter, now a place for movie news! Arnold Schwarzenegger is currently shooting The Expendables 2 in Bulgaria and is reuniting with his costars Bruce Willis and Sylvester Stallone for his scenes. How do we know? Schwarzenegger tweeted this picture to confirm it. The film is scheduled to open in August 2012.

Willis suggested his part would be bigger in the second film, though with this picture it suggests that he and Arnie will share a similar role in this movie, at least from the outset. Schwarzenegger is currently in pre-production on his next film – Last Stand – but as he’s no longer the governor of California, he should have much more free time.

The IMDb is currently filled with interesting rumored casting, most likely untrue (currently the page lists Nicholas Cage and John Travolta), though it is known that Jean Claude Van Damme and Liam Hemsworth will be joining the cast that includes returning cast members Stallone and Jason Statham. The first film grossed $103 Million domestically, and $274 Million worldwide, which explains the sequel. The biggest cahnge for this film is that while Stallone wrote, directed and starred in the last film, this time he’s handed off the directing duties to Simon West, and is not currently credited with the screenplay.

How do you think should be in Expendables 2 who wasn’t in the first film?