In the new teaser, only Dumbledore, Queenie, and Jacob actually look at Grindelwald, and I can't help but think it's because they're the only three that really recognise the danger. Dumbledore because he's old friends with Grindelwald, Queenie because she's a Legilimens, and Jacob because he trusts Queenie. I dunno, that's the one thing that really struck me with the teaser.
This is a really really cool theory. I can see JKR doing something like that, especially bc Queenie’s legilimency has always been her major character trait!