With Swank already a part of The Karate Kid family, and with a recent relationship with Netflix, I would think it wouldn’t be that hard for the Cobra Kai team to reach out and gauge her interest in reprising her role as Julie Pierce.
Plus, with Hilary Swank already a part of the Netflix family with a voice role in Bojack Horseman and the series Away (which was canceled, unfortunately), it almost feels like the odds are good that she could appear in Cobra Kai.
Netflix is seemingly all about synergy with its actors, and once one actor joins in on an original series, it’s not at all uncommon to see them pop up in others.