According to Variety, there's a good chance Anomalisa will premiere at the Venice Film Festival. We'll find out for sure in less than ten days, when Venice's line-up is announced. The festival will run from September 2-12.

[...] several high-profile U.S. studio/specialty titles appear to be secured, including Scott Cooper-directed Johnny Depp gangster drama “Black Mass,” from Warner Bros., and Luca Guadagnino’s Ralph Fiennes and Tilda Swinton-starrer “A Bigger Splash," which Fox Searchlight is releasing stateside.

Also likely to be Lido-bound [is] Charlie Kaufman’s stop motion animation “Anomalisa” [...]

Kaufman’s “Anomalisa” marks the groundbreaking U.S. director’s first foray into animation. The movie, co-directed with Duke Johnson, initiated on Kickstarter with the bulk of financing then coming from Snoot Entertainment and SBI. The synopsis for the film is a man struggling with his inability to connect with other people. It is Kaufman’s first feature since “Synecdoche, New York,” in 2008. (Source)