There's an interview from here that should shed some light.

https://www.bluegartr.com/threads/129553

On that note, you said it wasn't related, but what was up with your Spider-Man t-shirt today?

Yoshida: Oh, that was nothing (laughs). There isn't just one director for Spider-Man, though. Maybe it's a spiderweb class. It's a job that has a Final Fantasy feel to it, and maybe spiderwebs are related (laughs). Hopefully you can consider that and get excited.
The only Final Fantasy job that I know of that has actually used webs is BLU. This doesn't mean that SAM won't happen, but it seems to me that the shirt was hinting at BLU.