I’m keeping my expectations in check but:
It’s a full 15-seconds VFX shot, it would be costly to do so only for a trailer (not saying it’s impossible, but those movies tend to have smaller budgets); A24 has done sizey content in the past; The overall semi-supernatural plot does lend itself to such a scene even if it’s just a short one;So overall I’d say it’s probably just a metaphorical scene but I still have a little bit of hope.