I think the "action feature" gimmick COULD work if they were alternate accessories, but only for a select few characters. Take Spider-Man, for example. You can give him fist hands, web-shooting hands, and "wall crawling" posed hands with suction cups on them. If you don't like the hands with suction cups, fans could use the other hands. Or you could make a Cyclops with the light-up eyes like Toy Biz used to do. Or you could have a Doctor Octopus where two of the tentacles had the "gripping" pincers feature and/or the other two tentacles had suction cups, but they could be interchangeable snap-on accessories at the ends. Or the "quick change" armor pieces for Iron Man. For some, the "action feature" wouldn't work and fans likely wouldn't want them, like Dr. Doom's spinning hand, Human Torch's "throwing" arm for his fireball accessories or the Hulk's "crushing arm" feature. That said, I wouldn't mind a new figure of the Thing with a Yancy Street street sign accessory.
If they wanted to REALLY divide fans and go retro, they could always do the "electronic" wave from Toy Biz where you had eight popular figures with a speaker box you could stick onto their back that would have two phrases and a sound effect included.
For the new Retro "Secret Wars", I'm surprised they didn't let the Wolverine figure have alternate hands with the claws painted black like the Mattel variant did in 1984. Maybe if they make a Retro "Secret Wars" figure of Doc Ock, they could include an alternate head with black hair like the Mattel figure had.
