I’m currently working my way through the Jurassic Park 4k set. The original film looks stunning. The second one looks pretty good too. There’s a massive drop off in quality with the third one though, it looks worse than a lot of 1080p blu-rays I’ve seen. Haven’t watched Jurassic World yet, but it’s a recent enough movie that I’d assume it’s original master would yield a fine UHD disc.
The third one was basically a direct-to-video kind of movie that ended up in a theater anyway, right? No one really seems to care about it.