I wonder if it has to do with the newly announced Cars expansion and Villains Land, even if it seems early to make this move, considering we're still years away from opening (potentially 4 years for Cars, maybe 6 for Villains?).
They might be trying to appease guests wanting more Villain content now, but I suspect there is some marketing or research going on here. The show feedback could give them early insight into future decision making. Could they be testing crowd reactions and enthusiasm for certain villains over others? Trying different villain storylines? Seeing what works and what doesn't, so they know who to focus on in the new land?
I don't know. I assumed the Cars show would have eventually gone away, just not this soon.