Arceus has great potential, but based on the teaser/trailer it looking for me that the game going to have problems with plank overworld.
If you make such a good overworld, you need to fill it with lot of characters, great story and A LOT OF Pokemons.
Based on the infos they cut of all gym battles/championship, probably not even a normal pokemon battle against trainers around the world. I hope Im wrong and the game top my expectation.