This is ultimately one of many different reasons why I think making this coaster Slinky Dog 2 instead of something like Velocicoaster is a misfire.
Disney will never win the IP battle for these gens when Universal has Nintendo, HP, etc. They have to win by better, grander experiences for those rides. For many a Slinky Dog level thrill for a villains coaster, even for a ENG coaster based on that scene (that has a 90 degree drop and high speed) will be underwhelming for the guest expectations. Expectation for a coaster in a villains land is not another tame experience similar to what exists in MK.
On that, talking with Gen Z who went to Disney & don't beliving the magic meme, Magic Kingdom is usually put as the worst park they went to (sometimes under AK) due to small size and lack of perceived older age attractions. They much preferred Hollywood Studios and Epcot for older-geared experiences. Perhaps unfairly MK is seen as watching your toddler have fun & having almost nothing else if you have no kid, and remember Gen Z largely is not having kids. Being the flagship that stigma extends to the resort as a whole. A extreme, potential top 5 coaster in the world (like Velocicoaster usually is ranked) + top in the world villains dark ride would go such a long way in breaking that stigma & make Gen Z think it is worth the high admission. It would cost the same if not less than this Slinky 2 coaster.
This is the most visited theme park in the world, so maybe they simply do not care for good reason. But this would permanently put MK and indirectly the resort in that uncool, toddler only image to Gen Z and beyond, vastly different from Universal's many experiences for all ages image. If they cannot gear one ride older for a villains land they never will, and why should this gen & younger care for them vs Universal? Not like their nonexistent kid will beg to go.