Originally Posted by Bacchus
Also, it's not that I'm surprised to see him out of the quantum realm, I just think it was an odd scene to show in the context of the rest of the trailer. It's just sort of killed whatever suspense there was about his fate after the snap. Minor quibble though.
I think it actually makes sense. We saw on the screens Banner was looking at that they thought Scott had been killed in the Snap (aka Spoiler: 'The Decimation'
according to sources). The fact that now Scott has somehow returned gives them a bit of hope, a sign that maybe somehow, what happened can be reversed or people brought back. While the rest of the trailer is them beaten, lost, largely aimless... Scott somehow coming back (seemingly after a decent period of time if Cap's first reaction was to question whether it was an old recording) is the glimmer of hope that will give them something to fight for.
Admittedly, the tone of it is jarring considering the rest of the trailer, but I think it works.