Octopath 0

So as far as I understand the travellers from OT1 are in the game. As i played the mobile game i see a way to implement them without creating issues with OT1, but gameplay wise it will be quite troublesome except the 40% new story change the story a lot. Anyone has an idea if the 40% will go into the town building arc, or if they take 100% of the mobilegame story 60% they keep from it and 40% will be a rewritten?