True, sequel sickness has struck the 2007 summer box office. But already 6 movies have topped $100 million in domestic gross receipts. And it’s not even July 4th yet. Spider-Man 3 (Sony), Shrek The Third (DreamWorks Animation), Pirates of the Caribbean 3 (Disney), Ocean’s Thirteen (Warner), Knocked Up (Universal) and Silver Surfer (Fox) have all pushed past the magic mark. (Of course, this doesn’t mean they’re all profitable.) Box office gurus predicted to me that the mega-blockbusters about to flood North American mega-plexes from May through August could gross $4.5 billion, becoming the highest summer on record. But already analysts are warning 2007 summer may not beat 2006’s $3.8 billion. I’m not so sure. There are a lot of huge movies coming up, like Transformers (DreamWorks / Paramount), The Simpsons (Fox); sequels for Harry Potter (Warner), Bourne (Universal) and Rush Hour (New Line); and some maybes like Hairspray (New Line) and Chuck And Larry (Universal). Meanwhile, a total 10 movies have passed the $100 mil mark for all of 2007 so far — the previous six + 300 (Warner), Wild Hogs (Disney), Blades Of Glory (DreamWorks / Paramount) and Ghost Rider (Sony).