Good question. Personally I'm not keen on Disney owning yet another corner of childhood entertainment, considering they're making all the movies and own all the television now.
Disney could easily buy out a bunch of companies (like with Lucasarts) or start its own division using all the franchises they now own. There probably is a nightmare involved of untangling all the other licences they've issued to other companies like WB, but what's probably stopped Disney so far is that it doesn't like anything deemed family unfriendly. Game companies usually make games to appeal to a whole age range, whereas Disney would be stuck making games that are safe for teenagers and children only, bereft of the realistic graphic violence or adult themes that makes up a huge portion of the games market. They'd be having to spend a lot in a market where their hands are tied as to what content they provide, and they don't have the same reputation for games as they have for movies, so they can't go on brand alone.
Disney could easily buy out a bunch of companies (like with Lucasarts) or start its own division using all the franchises they now own. There probably is a nightmare involved of untangling all the other licences they've issued to other companies like WB, but what's probably stopped Disney so far is that it doesn't like anything deemed family unfriendly. Game companies usually make games to appeal to a whole age range, whereas Disney would be stuck making games that are safe for teenagers and children only, bereft of the realistic graphic violence or adult themes that makes up a huge portion of the games market. They'd be having to spend a lot in a market where their hands are tied as to what content they provide, and they don't have the same reputation for games as they have for movies, so they can't go on brand alone.