Gonna spout a little bit of opinion/meta here.
Allison has tears in her eyes. Sheās petting this huge wolf, and it looks like itās probably dead, due to how haphazardly itās draped over the chair that sheās sitting in. We know that Allison has been stepping into her leadership role within the Argent family, especially now that sheās decided to reshape their entire code. Sheās grown up and grown stronger - and grown responsible.
To me, this reads as a guilty face. Not just one of her being sad, but of her blaming herself and being so utterly resigned to it that she canāt do anything but sit it out.
But going further, sheās holding a white/blonde wolf. Scott and Derek are both presented to us, through the 3A opening, as black wolves. So, this is most definitelyĀ not either of them. Allison will be becoming romantically entangled with Isaac during 3B, and we have yet to see what he would theoretically look like as a full-on wolf, but my bet is on it following the hair-to-fur trend and coming out as similar to this one.
Now, to link these two ideas, and to explain the deadened wolf that lies before us, Kate Argent makes a return, at least in Allisonās mind. She showed up in the sneak peek given to us at the end of 3A, and she was ready to string Isaac up and end him.
We already know that thereās going to upset among our merry band of werewolves and humans, and we know that Isaac and Allison are going to prove less than compatible. What if things get out of control with her hallucinations? What if her relationship issues manifest into violence because of the ādarkness around her heartā (i.e., Kateās presence)?
Allison may end up killing Isaac.
And never forgiving herself for it.