I hadn't heard of this before, and am I not a big fan of Jack Black, but the Cain and Abel portion of this clip was funny.
The stoning sequence reminds of the one in Monty Python's the Life of Brian. It's hard to imagine this film stoning scene will be funnier than the Python's.
I saw the trailer and it made want to see Jack Black's faux film with Cloris Leachman from The Office instead.