The studios didn’t say how much they put in to the privately held maker of free-to-play social games. But it appears to be significant to Kabam: Warner Bros Home Entertainment President Kevin Tsujihara will become a member of its board, and MGM chief Gary Barber will be an “observer” on the board, according to today’s announcement. Kabam just released “The Hobbit, Kingdoms Of Middle-earth,” a game it co-developed with Warner Bros Interactive Entertainment. They’re working on another game for early next year: “The Hobbit: Armies Of The Third Age.” “As we worked with Kabam, it became clear that a closer, more strategic partnership made sense for us both,” Tsujihara says. “Kabam is a leader in the industry and we look forward to being a part of their continued growth.” Other investors include Google, Intel, Canaan Partners and Redpoint Ventures.