[Discussion] According to you, what was the most unnecessary and worst sequel of all time?

I know this is probably one of those 'fun facts' that everybody knows but learning that it wasn't written or made as a sequel and the studio shoehorning that in after the fact to market it makes it a lot less atrocious. It's still not a great movie but not as offensive as it would've been had it been made as a sequel from the beginning.