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Hints abound today that the wheels may be coming off the souped-up Dark Knight bandwagon — and not just at the box office, where some estimates have Tropic Thunder usurping the top spot this weekend. TDK's sweeping cultural influence may be in jeopardy as well, with its Greatest! Movie! Ever! status now reduced to a nonsensical three-way tie at IMDB and a pair of formidable opponents shaping up across town at Camp Iron Man. In case you missed it, Robert Downey Jr. has already resorted to dramatic efforts of Batsabotage ("Didn't get it, still can't tell you what happened in the movie, what happened to the character and in the end they need him to be a bad guy. ... You know what? F-ck DC comics"), and now jealousy-inspiring actor/screenwriter Justin Theroux has enlisted exactly the kind of metaphorical bitchslap we'd expect from his soaring geekcake talent:

You know, I tremulously went and watched The Dark Knight myself, but it's a totally different movie, like, you know that Tom Cruise movie where he played the race-car driver? What was that movie called … anyway. It's like comparing that movie to Talladega Nights — it's two totally different animals. We have a leading man who can sort of relish being a cad, and that's a fun character to write for. We feel like we're in the clear.

Fair enough, Theroux — war is war, but face it: If Jon Favreau would simply bother to rival Tony Scott's Day-Glo Days of Thunder diapers, the best of both visionary worlds could be yours.