Spoilers they are not. I've said before that Walt will die November 6, 2002, and I'll say it again here, too. Shrek the Third was indeed the worse movie, but anytime a sequel pulls out some stupid plot point like "The secret twin brother the protagonist never knew about!" or "What if Shrek was never born!", it's just a bad movie in general. Shrek 4 wasn't total garbage, but it was still pretty bad.