Adventures of Tintin. Peter Jackson was supposed to direct it, but unfortunately he got busy with Hobbit.
Apparently they were supposed to adapt Prisoners of the Sun, which is arguably the best Tintin storyline to make a movie of.
The Adventure of Tintin.
Constantine. Keanu Reeves has said he would like to do it, and there is a ton of story material to draw from between the Constantine series and all of the Hellblazers, not to mention cameos in other series.
TRON: Legacy
Should have made the sequel before Daft Punk retired
It was so boring and uninspired. Reminiscence - The movie. Just regurgitating everything we saw in the original.
I found it strange that the modern TRON felt so much more lifeless and drab than the original’s, given the limitations on the original’s technology. The worldbuilding was flatter, the characters were extra flatter, and the villain’s plan didn’t make any sense.
I almost wish he’d succeeded so that we could have seen Clu’s giant digital aircraft carrier trying to squeeze through that laser emitter and cram itself into the basement of an abandoned arcade. Either it would wreck itself instantly or it’d come out as a wee little tiny thing, equally amusing outcomes.
Sometimes I feel like the only person on the planet that enjoyed the movie. It’s my guilty pleasure watch.
The Matrix
“Not like this” intensifies with every sequel
I’m not necessarily surprised this one didn’t get a sequel, but I really wish it had!
Event Horizon (1997)
I like the fan theory that Event Horizon is a prequel of sorts to the Warhammer universe.
