9. MODOK And AIM
Ever since their MCU debut in Iron Man 3, Advanced Idea Mechanics, or AIM, haven't been active in the MCU. They seem to have faded away after Tony Stark stopped their master plan. However, if the cinematic version of AIM is as dogged as their comic book counterparts, this isn't the last we've seen of them.
Iron Man 3's AIM didn't work well, since they lost the campy charm that made their comic book counterpart, instead coming across like a sciency version of HYDRA. Of all the MCU franchises that would best fit the beekeeper suit clad weirdos of the comics, Ant-Man is by far the best fit. How else could MODOK, the leader of AIM and a giant floating baby head, be taken seriously?