According to insider Miller Ross (who derived several details from the closed alpha), Season 3 will feature lots of “Arkham nostalgia” with players traveling to Gotham City. “It’ll be a big moment for the game, post-launch. Then they follow that up with Deathstroke in Season 4. It’s a strong pitch.” Ross notes that the season will “take us through Halloween and Black Friday. Big sales window.”
When asked if a thought-to-be-decreased character thought will return in the season, he replies,l
“Not the character you’re thinking. But at that point, it’ll be clear what’s up, and anticipation for that character should be rising. Probably lots of hints and teases.”