“Eisenberg & Morgan†has a real ring to it. The unlikely comedy duo is set to take their vaudeville act to the big screen in Why Stop Now, a film about a piano prodigy (Eisenberg) who helps his addict mother (Melissa Leo) get one last fix from her drug dealer Sprinkles (Morgan). It sure sounds madcap and zany and Tracy Morgan’s character is freaking named Sprinkles. The movie comes out in August and then there’ll be no stopping the modern day Abbott & Costello that is Eisenberg & Morgan