Are they gonna release more pokemon with delta with their name? because since some pokemons have pokebodies that require other delta pokemons i think they will be useless if they doesnt release more deltas. thanks
I doubt it. I'm pretty sure we've seen the last of δ Pokemon, at least for a long time. Perhaps once they release all the new Pokemon they may make a "Holon Research Returns!" set, but by then the old ones will have rotated out. They remade the Team Rocket set, so it's still possible.
There probably will be a Team Galactic set, maybe that one has something special. Like, Rocket Pokemon had Dark as their 2nd type, some evolved Delta had Metal, so now maybe...Galactic energy? xD Iunno.