Here’s my thoughts first:
Nancy, Mr. Winkle, and Does Bad Things Guy should be the villains in Jeffy’s 20th Birthday, let me explain:
Nancy:
Me personally I want Nancy to come back but revived by the devil this time instead to get revenge instead of money for the times she was unsuccessful.
Mr. Winkle:
I want Mr. Winkle to appear instead of Screwball and I don’t want Screwball to be a villain in this video because while he may be dumb, I like to give him the benefit of a doubt that he learned his lesson, plus Nancy might get help from Mr. Winkle instead as she probably won’t want Screwball to work with her due to his low intelligence and the past unsuccessful times in Jeffy’s 18th and 19 birthday. Also, if Screwball appeared in Jeffy’s 18th and 19th Birthday, then I don’t why can’t Mr. Winkle can’t appear in Jeffy’s 20th Birthday.
Does Bad Things Guy:
Although this might be unlikely as his last appearance was in 2017 in The Secret Door, I still hope he’s alive and comes back just like Nancy did and kidnaps and impersonates Brooklyn Guy as they’re identical to each other to help Nancy and Mr. Winkle get away with kidnapping and trying to murder Jeffy and Brooklyn Guy as they’re both common enemies and have the same birthday. Also if Nancy can survive a shot and come back, then why can’t Does Bad Things Guy?
But that was just my opinion and thoughts, now I’d like to see yours!