The Terminator franchise has been a real disappointment since Cameron left. I only consider the first two canon, the rest is just crap that messes with the lore and themes. I don´t think T6 will be any good either, despite Cameron on board as producer, and Linda Hamilton back as Connor.
The Matrix is also a disappointment, although I gotta admit that Reloaded has some of the best action scenes ever put to film. The Burly Brawl and Chateau fight are so well coreographed and insane it borders on ridiculous, yet they are so awesome. And the higway chase scene, man I will never forget when I saw that at the cinema, it was so exhilarating that I almost pissed my pants in excitement. So give Reloaded a pass. But Revolution was complete garbage, I agree on that.
Another franchise that went off the rails quick is The Crow. The first one with Brandon Lee was so fucking good. Dark and moody, with a lot of heart and style, it captured the feel of a live comic book like no other had done before. Then came the sequels who sucked big time. I was very hyped with City of Angels but what a let down. The new guy didn´t have the same screen presence as Brandon and the film lacked the edgy and slick directorial style of Alex Proyas.