Yeah, you're right. I think this is how it goes:
Emmett will win against all three of them
Gary will win against two of them (Jill and Talla, the latter more of a definite)
Jill will win against one of them (Talla)
Talla wins against no one
What'll be interesting to see is if Emmett wins Veto who he'll send home. Talla because he knows Gary will take him to final two over Talla (which he won't if he has any sense and I'm sure has said), or Gary because the win will be much more comfortable versus Talla than him.
Gary needs to win it and then Emmett can go
but I doubt it