One moment in the Doomsday trailer really stood out to me. When Thor sends Mjolnir toward Steve to make sure it's really him, it made me wonder if Marvel is hinting that this isn't actually the Steve Rogers we know.

Do you think he's our Steve, a multiversal variant, or even someone like Captain Hydra? Or was Thor simply making sure it was really Steve before trusting him?

I'm probably reading too much into the scene, but it definitely made me curious.

I've seen a lot of theories about this, and I'm excited to see what turns out to be true. I've seen speculation that it's actually shapeshifted Loki, that it's Captain Hydra, etc.

The Captain Hydra angle would be interesting. An evil Cap aligned with Doom who infiltrates the Avengers by appearing as a friendly face.

That would be more creative than "here's Chris Evans playing Captain America again!"