Juan will be either demoted (to Gym Trainer, Towel Boy, Gym Leader's Slave, etc.) or forgotten.
Are the Unovan Gym Leaders in this? If not then good 'cause there's too many of them as it was 10, right? Anyways they got rematches so they don't need to be in this.
Either way I hope the above aren't put in this as 53 trainers are overkill and they WILL end up using the same Pokemon over and over again. Ex: We have Iris/Drayden, Lance and Clair. Who gets to use the Salamance. Or Dragonite. Or whatever.