The LEGO Movie 2 Collectible Minifigures (71023) will be released in a few weeks or earlier depending on if the retailer decides to put them out ahead of time. I’ve been asked many times so far of the box distribution of the minifigures and it has been confirmed by Promobricks that there will be three complete sets in a box.
What’s even more interesting is that each row of 20 is a complete set of minifigures. If that’s the case, there’s not much randomness to them and a brand new box will guarantee you a set without even feeling for them. I’m not sure if LEGO will change that later on but I doubt that it will at this point. If you do find a box in the wild, let us know if that’s the case.