Depends on how it services the whole. Sometimes the journey you're taken on should end predictably, because everything until then is unfettered. Reservoir Dogs has a predictable ending. Gangster crooks conspire on a heist & end up turning on each other in a Mexican Stand-off, where the undercover cop is revealed & they all end up dead. Doesn't get more predictable than that... Still a damn good ending.
Cartoonist Max Fleisher, the creator of Popeye, & Betty Boop, was asked why when he made the Superman series it was so starkly different in design, so straight-laced & standard looking compared to his earlier work. His response is an absolutely brilliantly simple tenet I take with me to this day
He said because with Popeye, the story & concept is rather plain, a gruff sailorman who's always getting in dustups with his nemesis, usually over the female interest. It's so simple that in order for it to be creative, you have to make the visuals the creative bit. You make them look ridiculous, & make the production absolutely insane
But with Superman, the story is literally an alien from another world, comes to Earth with godlike superhuman powers, & becomes the savior of countless people in need. That is an outlandish tale indeed, & that's why you make it look rather straight-laced. It's balance