Nice work! I was looking forward to watching this - and in the end, I was quite pleased with what I saw, but also slightly... disappointed :/
First of all, I feel like this was less of a collaboration, but more like a compilation - the parts are vastly different from each other and while it was cool to see various art styles throughout the entire video, it highlighted the strong parts of the collaboration and also made the "weaker" parts look worse in comparison to them - due to either having a much shorter duration, absence of audio, whackier visuals or just a somewhat lame joke-
Each part was pretty good in its own right (and some were phenomenal, like I definitely must mention the excellent work which was done on the PeronaxZoro 3D animation part, animation-wise, length-wise and humor-wise, that moment with Zoro having traumtic flashbacks about the training with Mihawk and Perona's Chucky doll were fantastic - and also the fight between Luffy, Franky and Lucci, everything was well-done - the final "Luffy wants to be a pirate" animation made me crack up with Shanks answer to Luffy having stabbed himself through the head), but deep down, I wished for there to be more of a quality standard in here just to ensure that the parts which are somewhat worse than the others do not get downplayed too much - and it would have also been neat to see the parts be more tied to each other story-wise so there is a better flow of action throughout the collaboration, like, there is one part which has some really cool action going, and then another animation with a whack joke comes next and disrupts it :/
I hope I could help you all out with this constructive criticism - keep up the strong collaboration game and - just as Luffy who's looking for the One Piece - never give up! :D
I was originally going to briefly write my opinion for every single part, but refrained from doing so, since it was a little bit tricky to identify who did what exactly and I would also have to abide by the principle "if you are gonna do one, you gotta do them all" - if you want some opinion on your part in particular, message me and I'll happily let you know what I thought of it ^__^