The biggest problem is it's the sequel to a movie that wasn't supposed to have one. In Stanley Kubrick's eyes 2001 was a single, complete story. Peter Hyams had to recreate the 2001-related stuff for his film because (IIRC) Kubrick broke everything down after he was done with it.2010: It's a major letdown compared to 2001 but the aero-braking around Jupiter was a cool scene.