I recall earlier during the werewolf path that the leader of the pack mentioned another rival group, and he was furious about the topic and of course there are many factors that can be exploited in the story, such as the red sand and the twins that promote it, this point can be used as a start, for example the twins trying to increase the pack number and train them in preparation for fighting Erika's pack, or maybe it can be the last quest for Erica to be the Alpha.
For the losing side, Erica can choose between letting them stay and join forces or leaving Caliross permanently.
I'll keep sending any good scenarios to you, it might help.