https://www.gamesradar.com/gotham-kn...y-dynamic-duo/
New interview with the game's producer. Most of it is the usual PR-speak but the bits that caught my attention was: the story is a wholly original take developed by WB Montreal, the story was the cornerstone for the game's design (they started with the central mystery and then selected heroes and villains as they though the would fit better the roles they wanted), characters not used will level up and get upgraded roughly at the same rhythm as your picked character under the justification they're having their own adventures while you play.