The Ending: Marky-Mark returns to planet Earth safe and sound, only to find that General Thade’s simian mug has replaced that of honest Abe on the Lincoln Monument. Eh?
Why It’s So Bad: It makes no sense in the context of the rest of the film!
Thade was defeated, so how has the timeline been altered? We’re never told.
A cheap attempt to recreate the big twist at the end of the original.