Keldeo appearing in the anime along with his movie debut? It would definitely be a first. And with all the competition it doesn't seem like Ash, Iris, Cilan or Dawn will make it very far in the tournament. Two champions, an Elite 4 member, a gym leader who might as well be an Elite 4 member and now a trainer with a legendary. Cilan and Shizui will be tough themselves considering they're both gym leaders. Dawn may be made as strong as a gym leader here just because its her cameo just like Misty, who was made into an epic Gyarados wielder, and May, who had a ****-ton of evolutions prior to her cameo. And Ash probably knows his only shot at winning is if he uses his reserves, which he may. Iris is the odd one out unless they make her stronger all of the sudden too.