What if Derek’s new love interest is Deucalion?
(Maybe Deucalion is actually an old love interest but Derek never officially broke it off. Derek does seem bad at these things.)
Maybe that’s why Derek knew the Alpha Pack was going to eventually show up. Derek (and Laura) didn’t come back to New York, so of course Deucalion and the Alpha Pack were going to track them down.
And upon finding Derek and Derek’s failing Pack… Massive drama ensues.