We're getting two separate update dlc based on new legendaries but what about Eternatus? Will they just leave it like that? Sure it did play a role in main story but it still seems so mysterious.

Then again if dlc now replaces third versions it means we wont get updated region and story, its just "post game"-like additions. So since we already captured Eternatus does it mean its story arc is done?
A final update focusing on Eternatus would be pretty cool. Imagine final DLC with Kalos and Eternatus vs Zygarde. Thats too hardcore tho