Asklemmy

Jurassic World. Just give me 90 minutes of dino mutants fighting, I don't give a shit about Chris Pratt nor some random kids.

CATS

Cats is not a complicated musical. All they had to do was animate it and get actual voice actors/singers. I've seen sketches for what I think was a Tim Burton sketch, and that would have been a million times better. I don't know who looked at Cat's and was like, "Yup, we need CGI." It looks horrendous and sounds bad more often than not. The musical is already pretty out there, how much more fun would that movie had been if we had animators working on it. The creative visuals, colors, motifs. Not to mention a cat is a wonderfully complex animal to animate just because of how they move. That movie could have been a visual delight in part with the Spiderman movies if they let it, but noooooo. Let's make a nightmare.

The original Purge. I thought all the background stuff and setting were super interesting, but the film itself was a generic home invasion movie. The sequel expanded on all the stuff I was interested in, though.

Cabin in the woods

I agree with all the other people in this thread mentioning 'In Time'. It had such a great premise, and I didn't even hate the execution, but it was mediocre. It was like they went 50% of the way to a flawless execution and just said "fuck it, that's good enough". The concept has a lot of elements to explore, like classism, labor exploitation, human rights, even free will to a point... A movie just isn't the right vehicle for that story. It needs to be a series. Done right, you could explore all that while having an overarching plotline, and still have your weekly subplots and B stories. That would give the story time to fully develop the romantic connection between the poor guy who comes into a bunch of time, and the rich girl who empathizes with him. That romance felt incredibly rushed in the movie, but you could build it up over a whole season in a show.

I also want to mention another movie that I'm not sure belongs here. It's not a bad movie, nor do I think the execution was mediocre, but for the life of me I can't figure out why it didn't do better. That movie is called 'Push', with Chris Evans and Dakota Fanning. I just watched it again the other night, and I freaking love it. The concept isn't that amazing or original, but the way they present it is great. There isn't a ton of exposition or world-building. They kinda just drop you in and let you figure it out, and I really like that. Evans and Fanning have great onscreen chemistry, and Djimon Honsou is a perfect bad guy. This is another one where I think it would make a great series, even though I think the movie was done really well. It's just kind of a perfect mid-budget sci-fi action movie, and we don't seem to get those anymore.

Timeline! The movie was completely forgettable but the concept was pretty cool. I loved the book.

Madam Web. The premise of your perception being un-stuck in time and the ramifications that has for your psyche is really cool. What's not cool is hiring bad writers and nepo baby actresses to portray that story

Tusk

Eragon.

There is a reason that most fans pretend the film never happened