Just thinking about watching the movie sends shivers down my spine. 
I am curious to see how packed or unpacked the theaters will be. Either way, I'll be there.
The cast list has someone portraying former president Grover Cleveland. Heh.
And I think it would be a huuuuge stretch to say that this will make them "mainstream". Tim and Eric have been making shows for [as] for over six years now and they're still not household names compared to a show like Robot Chicken, which has been around practically as long as Tim and Eric productions have, or what have you.
Honestly, if you were to take an on-the-street survey, do you think most people would recognize the names Tim and Eric?
Besides, I think the ship has left the dock. The movie isn't gonna draw in too many new fans, in my opinion. It's niche humor anyway
I am excited!