This just popped up at Screamscape about a new ride rumor at Universal Studios Hollywood:
Universal Studios Hollywood
2013/2014 - New Attraction - Rumor - (2/20/12) While we wait for more information about how the Wizarding World of Harry Potter will be coming to Universal Hollywood, while Transformers is counting down the days until it is ready to open, we’ve gotten word about a possible new attraction that may be in development for Universal Hollywood. I don’t know the details, but I’m hearing that the feedback so far from Universal Creative about the new Despicable Me attraction going into Orlando has been so positive, that there are tentative plans in the works to try and bring a copy of it to Universal Hollywood as well. With Despicable Me 2 hitting the theaters in Summer 2013, I can only assume that they would be smart to push for a Spring/Summer 2013 opening date if approved.
They haven't even officially announced where they're putting Wizarding World of Harry Potter, so I can't imagine where they would put this ride. But if this does turn out to be true, then it can't hurt to have more attractions over there, especially if they're expecting huge crowds when Wizarding World of Harry Potter does open.