Susano
Banned
It was already half the way to become North Germanic, the reason I could see it rejoin North German were the Hanse, without the focus on French and the strong Norman aristocraty I could see English towns and cities joining the Hanse, and that would give mutual intelligible dialects a borst on both sides of course there's a good chance that Low Frankish, Frisian and Danish would join this mutual intelligible sphere.
As said, small chance of that. And I wouldnt really describe English as halfways North Germanic...