I'm honestly surprised that MIB 23 didn't happen. When 22 Jump Street jumped so dramatically, having Tatum and Hill crossover with another property would have kept the series fresh and keep the brand alive, and would be much easier for the creatives to work on than another straight sequel. Even if they went with the Men in Black angle, meaning a longer post-production time, it still could have been easily slotted into a 2017 or 2018 release. Hell, they could have used that movie to promote Hems and Thompson for the 2019 spin-off/remake/whatever Sony's doing. But at this point, we'll probably just get a 23 Jump Street that will probably drop like Hangover 3.
I also am a bit surprised we never got a Monsters vs. Aliens sequel. I know it didn't make a whole lot overseas, and Katzenberg wanted his films to focus less on parody, but it was close to making $200M domestically, and had some pretty good legs and reception. If movies that made less like Trolls can get a sequel, why didn't this? (Well, I guess Trolls could be like Cars, and be a moneymaker for Dreamworks in the toy department)
And while this could happen, I'm shocked Sony hasn't announced a Peter Rabbit sequel yet. It's already made 4.5x its opening weekend, and could very well even reach 4.75x, and the movie was made on a $50M budget, so the sequel could very well cost $70M at most. And unlike a movie like Smurfs, the film isn't considered a critical dumpster fire where a sequel would drop like a rock. Fast-track another one, put it in a winter 2020 release date, make profit.