The official Japanese Pokemon Twitter account has revealed Alolan Dugtrio from Collection Sun! Posters in Japan advertising the new set also show a glimpse of a Tauros-GX card, as shown in the photo below by twitter user @plus_yoyo_. Thanks to Bangiras for the translation!
Ability: Tangled Hair
As long as this Pokemon is in play, the Defending Pokemon’s Retreat Cost is [C] more.
[C][C][C] Dig Under: This attack does 50 damage to 1 of your opponent’s Pokemon. This attack’s damage isn’t affected by Weakness or Resistance.
Weakness: Fire (x2)
Resistance: Psychic (-20)
[C][C] Something with Rage: 20+ damage. ???
[C][C] ??? GX
When your Pokemon GX is Knocked Out, your opponent takes 2 Prize cards.