10 MCU Loose Ends That Drive Fans Crazy
4. What Happened To Ghost?
Ant-Man and the Wasp's main villain, Ava Starr - aka Ghost - is suffering from a condition that the movie describes as "molecular disequilibrium".
The cells in her body are torn apart and stitched back together on a consistent basis, and though this does grant her some pretty nifty powers, it's also a living nightmare, and Starr is desperate to permanently fix her condition.
Fortunately then, the end of the movie gives her a glimmer of hope, with Janet van Dyne stabilizing her using some quantum energy. However, this is only a temporary measure, and the mid-credits scene shows Scott Lang entering the quantum realm to retrieve more "healing particles" to presumably help out Ava in the long-term.
Sounds like a solid plan, but it doesn't pan out when Thanos' snap leaves Scott stranded in the quantum realm, kicking off the events of Avengers: Endgame. Ava isn't mentioned in that movie, and Scott never delivers her the particles - understandable, since, y'know, he did have more pressing issues to deal with.
This means that if she survived the snap, Ava goes several years without any new particles. And even if she was snapped, she's had to wait a fair old while for additional help. So shouldn't her condition have killed her by now? If not, how did she survive? As is the case with other entries on this list, an upcoming project (in this case, Ant-Man 3) might very well address this loose end, but for now, Ghost's fate is unclear.