User blog comment:ChishioKunrin/RWBY Volume 3 Q&A has BEGUN!/@comment-4010415-20151023063157

I think we're gonna find out Roman's Semblance in volume 3.

In the Facebook Q&A, someone asked if we'll get some villain backstory, and Kerry replied with "*wink*" We know, from JJ's Afterbuzz interview, that we will be getting villain backstory (specifically Mercury's, from before he went "full baddie"), so that "*wink*" meant yes.

Someone else asked about Roman's Semblance, and Gray replied with "*wink*" and Kerry replied with "*wink wink*"

Soooo... basically "*wink*" means "You're gonna see that this volume."

I'd personally say Kara's wink emote counts, as well. Someone asked if we'll get some Weiss backstory, and part of Kara's reply was "Winter is coming ;)" So, I think Winter will spark us getting to see some Weiss backstory.