While fans are still praying that Larry David decides to make another season of Curb Your Enthusiasm at some point, the writer/actor/comedian is currently busy riding around in cars with Jerry Seinfeld and prepping a “mystery project.”  Said mystery project is a partially improvised untitled feature film that will star David, Jon Hamm, and Michael Keaton and will be directed by Greg Mottola (Superbad, Adventureland).  Though we last heard that the film was set up at Fox Searchlight, it now looks like David is mulling a debut on HBO instead.  Hit the jump for more.

Per the LA Times, talks are underway to set the feature up at HBO instead of going the theatrical route.  Apparently the cable channel is willing to offer a higher budget than Fox Searchlight planned, giving David and co. more creative freedom with the pic.  The move makes sense, as David and Mottola both have ties to HBO—Mottola directed a few episodes of Aaron Sorkin’ The Newsroom (including the pilot) and is an executive producer on the series.  Moreover, Hamm’s fondness for cable television is no secret.

David’s pic isn’t the first to make the move to HBO following a planned theatrical release in recent months, as Steven Soderbergh opted to make his Liberace biopic Behind the Candelabra, starring Michael Douglas and Matt Damon, for the cable network instead of for a studio.  Plot details for David’s film are under wraps, but he’ll be credited as a writer, producer, and actor on the project.

The all-star lineup of David, Mottola, Hamm and Keaton is ridiculously appealing, and HBO seems a fine fit for an improv-style comedy from David.  Without the pressure to “appeal to the masses” on a costly theatrical release, the creative freedom provided by HBO should allow the team to stretch their comedic talents to their full potential.  Oh, and that dreamy Jon Hamm is one hilarious bastard.