Tentatively, consider yourself robbed. All we can do now is hope they have the other color planned.
Sinnoh has East and West gimmicks, so it’s certainly possible.
The lore of Basculegion is that it is fused from many Basculin, possible from both colors, so it’s certainly possible.
Current Basculegion’s color is much closer to the red striped Basculin, so it’s certainly possible.
Shellos, Gastrodon, and the original Basculin were all originally revealed only showcasing one of their variants, so it’s certainly possible.
ONE THING REMAINS:
prease understand