Indiana Jones and The Kingdom of the Crystal Skull (2008)
Huge fan of the trilogy and was very pumped about this... Wasn't even upset Shia was cast... But man what a disappointment... From the script to the fake cgi... Terrible.
This spoiler thingSo you didn't mind when a movie about...
slight of hand tricks from our 19th century universe suddenly went sci-fi, alternate universe? The worst part for me is that Bale tells Jackman the key to the transported man is Tesla to throw him off the scent of the real answer and Tesla just happens to have a cloning device, and leaves it for Jackman to just take for nefarious purposes.
So dumb.
Not sure if this counts as a movie but Stephen King's "It" on TV was a massive disappointment when it turned out to be a giant spider. Seemed like a complete cop-out to me.