The LEGO Movie 2: The Second Part is great. Take my opinion with a grain of salt given that I'm a lifelong LEGO fan, but holy crap this movie was so much fun. I'm sad it kind of crashed financially, but I can kind of see why. The Lego Movie 1 was this kind of out of nowhere phenomenon that just struck all kinds of joy that I didn't know I could experience, and the two spinoffs were very fun little side stories, but any direct sequel would naturally require so much focus on plot instead of spectacle that it only makes sense that the magic would wear off. You know the LEGO Movie Universe's business, you know the main characters, so instead of having the inherent bonus of being this beautifully built surprise spectacle, this one is mostly just about what these characters get into this time.
Not to say it isn't positively amazingly beautiful, I love seeing this fully LEGO built world once again (though I'm still not 100% clear on the water in the Queen's intro song. Is it brick built? I couldn't quite tell.*) This really relieved me after watching the LEGO Ninjago Movie which unfortunately featured some real world sand, grass, water, etc. Although, in hindsight, (I'm going off the rails) those might make sense given the timeline established in this movie. But that is a bit much. My other (minor) complaints were the absence and semi-absence of 2 characters from the first one, the semi absence being more excusable thanks to a joke in the credits. The other one, though, really felt a bit lost. I've been googling it, and I can't find any reason that these two wouldn't return to their significant roles. Come on, Morgan Freeman. What are you even up to these days?
Overall, it's still the second best movie in the LEGO-verse. The ranking being LM1, LM2, Ninjago (a series I don't even like), Batman (a series I adore). My DMs are open. Justin Theroux HEAVILY carried the LEGO Ninjago movie.