Indeed there are. I can see the 3 ta'vern as being those indicated and this would probably make the most sense overall, especially when we think of their special relationship and Mim's firefly visions.

But I just dont see it being the 3 woman 'as one' as this would indicate that they merge or combine for common purpose when their storylines keep them apart for now. The whole 3 on a boat thing, which is obviously them, is for after the Great battle is done. So is still while off yet.