John Cusack isn’t missing out on anything by not returning for this sequel to the surprisingly funny 2010 time travel-cum-80s comedy.

Now a super-rich megastar, Lou Dorchen (Rob Corddry), finds himself in mortal danger. In a time-travel scenario more complicated than Terminator, Lou, Nick (Craig Robinson), and Lou’s son, Jacob (Clark Duke), travel back to the future, where they meet Adam Jr. (Adam Scott), the son of their absent pal, previously played by Cusack.

The future gags are weak, and the gross-out jokes lack the wit to make them more funny than disgusting. Corddry is fantastic, especially in the small doses of Adult Swim’s “Childrens Hospital,” but so much Lou is too much Corddry. Robinson and Duke, the surprise MVP of almost everything he’s in, do their best with what scraps writer Josh Heald provides them.

Poor Scott is saddled with Cusack’s straight-man role, a position for which he’s far too talented; his drugged-out sequence—complete with fisheye lens—sums up the movie’s poor comic instincts. Even that dig is a compliment. And forget about female characters. We don’t even get the one token “strong” woman (see Olivia Thirlby in The Wedding Ringer). This trip is not worth the time it takes.