In a recent interview with Olivier Assayas, the director mentioned working with Rob in his next film.
"I see that in the United States, especially since the success of 'l'Heure d'été' and 'Carlos', I gained a relative notoriety, which sharpens the curiosity of some actors. In my next film, for example, will include Robert Pattinson."
ETA: Assayas mentioned Rob again in a different interview. This time with Studio Cine Live.
"These young guys deserved to be known. By the way, I'll likely shoot my next movie with Robert Pattinson."
In October 2012, Rob attended the IFC Film's Dinner honoring Assayas and sat at his table (Tweets were posted here).
First interview: Translation thanks to Pattinson Art Work | Source of the scans of the interview here | Second interview: Scans and Translation