Terminator salvation and wolverine can be added to the list of awful sequels, prequels and reboots.
There are also films that are terrible sequels but not terrible films.
Like the new star trek that movie was an awful sequel prequel, or superman returns.
To me the most godawful sequel is one you spend money on. For me that was Indiana Jones IV. The worst waste of ten dollars ever. If i want bad movies i could rent or buy the dvd for plan 9, or watch the mummy movies, but i did not imagine it would end up in a indiana jones film. Come on bad homages to bad 50's era movies, george sinply does not get the series if he thinks that works for indy.
I still have a contempt and loathing for the prequels of star wars because they rode the coatails of the originals and aimed so low it is pathetic. As far as i concerned Lucas owes my 40 dollars and an apology, for the disgrace that was the prequels and indiana jones IV. But it took the 2006 release of the originals as a bonus disc in shitty bootleg laserdisc non anamorphic quality to really set me off as a fan.
Other than the star wars books and comics and every now and again rarely video game, i never buy Lucas products any more. I will buy the clone wars show on dvd if reasonably priced and complete and in the correct aspect ratio. I will probably continue to buy the fate of the jedi novels and legacy comics.
But for indiana jones and star wars dvd releases on blu ray or dvd you can count me out on any new cgi tinkering or ruination.
In terms of video game sequels i must say the worst sequels i have ever seen are final fantasy X-2, Final Fantasy VII dirge of cerebrus or the prequel to final fantasy VII. All awful. I am actually one of the few who liked advent chidren.
Some would say resident evil 2 was a bad sequel i disagree that would be resident evil III imho. The worst has to be code veronica.
And non canon or unauthorized butchering of a series like the non Kojima metal gears on the nes.
Bad sequels also includes the jj film mission impossible III.
I cannot believe i wasted my time on that film at all.