I actually have a few things I would like to write for Marvel, none of which involve major characters.

First off, I would love to revive two of their attempts at "horror" comics from the '90s, those being Nightstalkers and Darkhold. For the former, the dynamic of Frank Drake, Blade, and Hannibal King as partners, friends, and occasional enemies (particularly for Blade and King) is interesting, and I would love to do something that allowed them to operate like an anti-supernatural wetworks team, maybe working at the direction of Doctor Strange to deal with lower-level mystical and supernatural threats like vampires, werewolves, etc., while he took on the dimension-spanning, world-threatening baddies. In the instance of the latter, I loved the anthology nature of the original series and the idea of a group trying to collect the pages of the Darkhold for evil and a group trying to stop them, but it got bogged down in too many crossovers and with too many appearances of mainstream characters like Sabretooth, Ghost Rider, and Punisher. Something like that should be more Lovecraftian (even though I'm not a big fan of his actual work), with the groups lurking around the corners of the MU, not running into major characters unless there was some really good reason to do so.

The other thing that I would love to try to make work, particularly in this day and age, is a revival of the Silver Sable title. She's a strong, independent female character who has her own crew of specialists to handle any job. I could see it as sort of a Mission Impossible-style title, with her taking on jobs for various entities that no one else will touch because of their complexity. She's responsible for the economic success of Symkaria, her homeland, so the higher the risk of a job, the higher the reward and the better it would be for her countrymen. It could have a real international flair, putting her anywhere on the globe with a handpicked team for each job, letting there be a rotating cast of supporting characters as well as the opportunity to bring in freelancers, such as Luke Cage or Paladin, for specific jobs.