It’s going to suck. Why? Because like all other recent comedies, they’ll opt for the easy way out and not craft a good movie.
It’s all about being cheap, just like Anchorman and every Adam Sandler movie. Have the star adlib until something "funny" comes out and then move to the next scene. Maybe throw a Ben Stiller cameo in there.
Instead of writing somewhat interesting dialogue and/or semblance of a plot, they’ll just throw Will Ferrell in there and have him utter nonsensical lines. That way, you get people walking out saying catchphrases like, “whale’s vagina” and “that’s how I roll” and other people will actually think it's a good movie.
Oh, and the shit-tons they'll make off marketing.
Cheap and unmemorable, that’s my prediction. If it’s not a waste of time, talent and potential, I’ll eat my hat.