Something's definitely up with Zurg. We didn't get him as a boss in KH3, even though we got what looked like a Zurg ship. Like they could've swapped out the heartless head for Zurg's and boom, instant Dianey boss.
The board game Villainous recently had an expansion that added the 1st Pixar villains to the game: Syndrome and Lotso. Admittedly Lotso probably did fit Villainous better as the game emphasizes scheming over raw power. Nonetheless he sticks out as a bit of an odd choice over the more established Zurg or Sid.
But still, it comes across as Pixar deliberately barring depictions of the old Zurg before this film is out. Combined with how he hasn't been shown in trailers yet it suggests this version of Zurg is gonna be radically different.