Everything is a clue, right? We saw Andy Serkis, Cap in WW2 era, and the twins getting along with Ultron.
Then there was Thor grabbing Tony's neck, Cap's broken shield, Hulkbuster armor, and James Spader terrifying children with Pinnochiolyrics. Now it's time to ask:
Who is This?
There's been a lot of speculation about the "tattooed person." They're standing in the doorway of a poor shack. Running from something.
Oh my, something is knocking down the door. We can see this figure has something on their head. Could it be an Asgardian helmet? Or a Wakandan charm?
Hmm...the person is wearing an apron...but is also black. It could be T'Challa, King of Wakanda!
Look at that back! That's...that's armor, or the Vision...or...is that an ugly shirt?
Yeah, it's an ugly shirt. Poo.
Who is the figure in the hut?
Oh well, I guess we'll have to be content speculating about these other mysteries: