I’m restating the obvious, but yesterday’s “Not-So-Bad Summer” piece reminded me what an unusual late July-early August we’ll be seeing this year. Four audacious, high-calibre films from a cluster of heavyweight older-guy directors — Michael Mann, Clint Eastwood, Mel Gibson, Oliver Stone — opening within a three-week period (7.28 to 8.11). Mann’s Miami Vice on 7.28, Eastwood’s Flags of our Fathers and Gibson’s Apocalypto on 8.4, and Stone’s World Trade Center on 8.11.