Sometimes I think all these “leaked” trailers are just a way for studios to beta test their films – get the audience’s reactions and make tweaks accordingly. I just have a hard time believing there’s such lax security around such a massive movie.
But oh well – it looks awesome. Ultron is no Pinocchio.
Bookshelf Battle 
Sooooo, is it May yet?
Sadly no – although it will probably be here before we know it.