We already had confirmation of Basic GX cards in Lapras GX and Snorlax GX. All of Tauros GX's attacks being fulfilled by a DCE provides a lot of potential.
I don't see Alolan Dugtrio being good competitively any time soon, since CCC is seems like too much for 50 sniping damage, and the Bench support ability doesn't matter as much with how little people actually pay for Retreat thanks to Escape Rope and Float Stone. All that stuff's going to have to rotate before Dugtrio's even looked at. It is cool to see Dugtrio as a Metal-type, though.