Dave Pratchett would be a close call to Bosch if they went that route, his work to me is hit or miss like Cathedral. Not to be off-topic but surely @mikejofthecoast you listened to Cathedral?
A lighter unpopular (but still not called upon enough to warrant optimal potential), somewhat limbo opinon is that Pokémon need to bring more deals collaborating with both past (MarioLuigi/Edvard Munch gave chance to see our loved artists within Pokémon return as predecessor to the continuing urnothodox godly TTGX Special Full Arts). Also the other side of the coin is collaborate with contempoary artists such as with the recent Eevee GX by Q-rais. 2019’s Munch card, who I’m sure really appreciated all the attention imo 
), Takashi Murakami and absolutely more Junji ito which I touched on a recent post emphasising this topic which is where we can follow.
