Overall I liked it, was too big on the ending (the island) or the kid angle, but I could deal with it. I don't think a lot of people would question or be pissed about him being back or wondering where he was, they'd just be grateful he's back and fighting for truth, justice and the american way.
Besides I thought Routh did a really good job, I wondered at times if he'd been watching the originals with Reeves, there seemed to be some mannerisms that were in there. Luthor was protrayed much better this time around, though his scheme seemed a little lame, but Spacey did a good job.