Produced for an estimated $90 million, Tropic also has been supported by $30 million or more in advertising, a media campaign roughly comparable to other R-rated comedies. Meantime, promo appearances by its ensemble cast have included the three amigos showing up in person on American Idol, the MTV Movie Awards, by video at Comic-Con and at Cinema Expo. ... All the humor-laced promos, combined with sustained tubthumping by publicists, have lent the air of an event film that's out of proportion to any reasonable earnings prospects. Superbad, an R-rated comedy released last Aug. 17, opened to $33.1 million and fetched $121.5 million domestically. The Apatow-produced comedy bowed a week after action comedy Rush Hour 3 debuted with $49.1 million.In this case, Tropic opens a week after Pineapple Express, another gleefully naughty R-rated comedy from Team Apatow. So we've got one stoner flick, one Hollywood satire, both essentially unpromotable by conventional prime-time standards. What could the difference between that and a steaming Ratner mean for Paramount/DreamWorks? Likely nothing on opening weekend, when Tropic could ride to $45 million on Cruise and Downey buzz. After that, though? Watch out for a gruesome bout of box-office cannibalism, interrupted every few minutes by innocent bystanders requesting two more tickets for The Dark Knight. The horror, indeed.