I'd like to see a more general show, let's call it Marvel Tales, that explores multiple marvel characters in short-story format all set in the shared world they've created for the movies that draw threads over a season and cross paths as storylines wrap up.
I also like the SHIELD and Cloak and Dagger ideas.
Considering they just introduced Thanos and we're dealing with the Cosmic Cube, Captain Marvel is even more appropriate than Adam Warlock. I'd love to see that.
I won't be too surprised if they go with something SHIELD-based for a TV series - something that's been generally established in the movies, but hasn't been particularly explored.