It was also an animated film without a major animated studio push that was released in March of all months against five other films on the same day. This will most likely be market as an event picture (the last one wasn't) and Christmas and Summer are the two prime spots for those sort of films. I think it'll do a lot better than that one will, especially with a man like Michael Bay producing it. Whether that's good or bad remains to be seen.
I don't know. Granted, I'm just speculating, but Platinum Dunes has yet to release an 'event' picture. Even their biggest remake "Nightmare on Elm Street," was released during the film dump months. Not to mention their track record is absolutely terrible. I wouldn't count on this being a summer or winter release. But I could be wrong.
Yea, I didn't see the international gross. But I remember the movie being greeted with a collective shrug. You're right though, it was decent for the franchise.