It's from the director of Napoleon Dynamite, so even before watching the trailer you just know it's going to be an off-beat comedy. From the official site, here is the description of the movie:
Jack Black stars as Ignacio (friends call him Nacho), a Mexican priest who moonlights as a lucha libre wrestler to raise money for his orphanage.
Of course you can't judge movies by their trailers, especially comedies, but I have a feeling about this one. Jack just comes off as so earnest in the scenes shown in the trailer that it makes it that much funnier than if he had played it with a wink at the audience.
Don't take my word for it, check it out for yourself here.
Also, with the director having been involved in three Mormon-produced films, I have a feeling that this will be funny without resorting to toilet humour and nudity.
It opens on June 2nd.