I have to say that I'm very surprised with the new revelations of Pokemon Ultra Sun and Ultra Moon. I hope what it was revealed in the last trailer will be used in the anime, mainly the "Team Rainbow Rocket". There are many things to comment.

The "Rainbow" part sounds ridiculous at first, until I realized that it might because it could represent the union of all the Villanous Teams' colours as a new organization. Think about it: Red from Team Magma, Orange from Team Flare, Blue from Team Aqua, White from Team Plasma in BW and Black from Team Plasma in B2W2... etc. It's like representing a stronger Team Rocket that "assimilated" what was left of the villains from previous Generations. This could work very well in the anime because it matchs the situation. In four Regions (Hoenn, Sinnoh, Unova and Kalos), after the defeat of the local villains, Team Rocket could have sent agents "to pick up the remains" of those dissolved organizations and "absorb them" to increase Team Rocket's power. We could see the result of that in the anime, with something really epic.