Without giving too much away this prologue should end with the two parties meeting up.
At that point the hooks will be availible to go either place, and if the parties all want to pursue one or the other together, that's fine. Or if you want to reorganize yourselves into two all-new groups, that would be okay by me as well. If only one or two of you want to go one place or another, then I can re-open recruitment for you to find allies along the way.
We'll keep it very organic.