WOOHOO!!!
I cannot wait! This will be my daughter's first Spidey movie(in the theater, anyways)!
I'm also hoping for a Lizard/Kraven combo, and I'm REALLY hoping for a far more personal story, preferrably character-driven, much like part 2 (still the best comic movie ever made).
As for a Batman and Spider-Man showdown, the only person who wins in that instance is the fans! That sounds like a PHENOMENOL summer!!
Of course, I still think the third Batman movie will totally blow chunks in comparison to TDK, though...I am optimistic, for the time being.