I want the villains out in force in Marvel (in general, its very odd that Uni hasn't added more costumed characters to Marvel - cheap and popular. I love the area immensely, but to anyone who knows comics its very 90s). I want Who-loween and the Cat in an Orange-and-Black Hat. I want dinos run amuck. I want family-friendly ogres and trolls. I'd be perfectly fine with some upcharge shows and events scattered about. Add trick-or-treating, upcharge or not.
The Minions as Monsters need to be someplace in Orlando, at IOA or as a meet & greet at HHN. In general, HHN needs meet & greets - bring the Monsters over from EU, get Sideshow Bob out there, make a Hank Scorpio outfit, break out Chucky and Pennywise (both versions) and Freddy and Jason and Michael and the Babadook and some Gremlins and Freddie Fazbear and whatever other ghoul is popular at the moment. Heck, throw in some Scooby ghosts too.
Meet and greets are really cheap, pull crowds, and can support ENTIRE EVENTS! I just don't see the down side.