I hope they actually bring up older characters watching Ash's league battles like they used to show.
I hope the rest of the rivals show the badges they obtained. Those are always fun to see.
These are the one's we know.
[Mixed] Trio Badge | Ash, Trip
[Normal] Basic Badge | Ash, Trip, Kotetsu
[Bug] Insect Badge | Ash, Kotetsu
[Electric] Bolt Badge | Ash, Kotetsu
[Ground] Quake Badge | Ash, Kotetsu
[Flying] Jet Badge | Ash
[Ice] Icicle Badge | Ash
[Dragon] Legend Badge | n/a
[Poison] Toxic Badge | Ash
[Water] Wave Badge | Kotetsu
(Psychic?) Lavender Badge | Trip
(Ghost?) Magenta Badge | Trip, Kotetsu
(Fighting?) Orange Badge | Trip, Kotetsu
(Grass?) Green Badge | Kotetsu