In my mind, summer movie season began this past weekend with X-Men Origins: Wolverine. It was a good origin story and Liev Schreiber played Sabretooth really well. The writers took some liberties with Sabretooth and Wolverine's relationship (they are brothers in the movie, rather than father and son like in the comics). There are lots of other characters that appear in the movie (Agent Zero, Bolt, Gambit, The Blob, Kestrel, Deadpool, Silverfox, Cyclops, Emma Frost) but only in a few scenes, lasting only a few minutes. I hope to see more of them in future movies.
Next up in the coming weeks: Star Trek and Terminator: Salvation.