For realz?

Ok so we all know that the new Casey Affleck film with Joaquin Phoenix documenting him trying to break into a hip hop career is coming out soon. I have one question, is this for real? I doubt it...or do I...? I'M SO CONFUSED. It's being discussed as a documentary, but I'm just very, very doubtful. I guess at the end of the day it doesn't really matter if he was really trying to be a rapper. Because if he was trying to be a rapper, that's totally awesome. If he's just pulling our legs, that's even better. It just looks good, I want to see it.