04/11/2009 05:12 am ET | Updated May 25, 2011

Jason Bateman: Will Arnett Isn't The Father Of Amy Poehler's Baby (VIDEO)

According to Jason Bateman, Will Arnett isn't the father of Archie Arnett and he knows this because Amy Poehler sleeps around a lot. Bateman also claims Arnett wears a hairhat and has man boobs. Damn. If this weren't a joke, it would be incredibly harsh.

This "feud" is an ad for an upcoming project the pair are involved in that's looking to capitalize on their previous relationship as squabbling brothers on "Arrested Development" to score ratings. Arnett gets some licks in (Bateman's childish) but none as inflammatory as Bateman's. We're sure he'll get back at him somehow.

Despite the fact that this promo doesn't really mention the show, it is designed to advertise the upcoming Fox comedy "Sit Down, Shut Up," an animated series created by "Arrested Development" founder Mitchell Hurwitz that's voiced by three members of the AD cast.

The show, based on an Australian sitcom, premiers April 19 and boasts the talents of Henry Winkler, Cheri Oteri, and Kristin Chenoweth. In addition to this project, Hurwitz and his gang are preparing to move forward on the long-rumored "Arrested Development" movie.