Sure, and if it was just about potential sales, that would make a Harry Potter set seem pretty likely. But they would also have to rebuild the staff who make the cash cow. And, again, they said they wouldn’t in response to this announcement. Like, if you want to argue that a possible future Harry Potter crossover could still eventually happen, that’s not impossible. But the partnership Hazbro was talking about is not an M:tG set.
WotC included. But this wouldn’t be going back on an announcement. That would be the parent company announcing something and the subsidiary saying “they aren’t talking about us” when it is absolutely about them.