I honestly like the idea of Gene Khan becoming canon to the 616 and being introduced as The Mandarin's son who after infiltrating and taking over the 10 rings reveals he has his father in a tank recuperating and has been paying imposters to keep up the illusion of The Mandarin still being active. I can see Gean Kahn organizing multiple groups and organizations staging a massive assault on a city that causes a major event and leaves multiple heroes dead. Perhaps the goal could be capturing the heroes to draw DNA and use it to both heal and strengthen his father.