Yuck, really dissapointing to hear that their first legit attempt at opening up the game and bringing it forward to match with more current tech will have world populated by gen 8 pokemon and not the original set.
Pokemon is about exploring to new Unknown places and discovering new Pokemon. You don't get that if its the 151 you already know about.
Besides, they'll probably throw in like 60 Gen 1 Pokemon anyway despite releasing a game with only them the year before.