Atlantic Drift is already a brand and they sell clothing/accessories independent of the Thrasher run sweaters they did.
As for boards, they could do one-offs with each Drift rider's board company if there are more aside from Isle.
Isle X Atlantic Drift
Polar X Atlantic Drift
Etc. as one-off collaborations. I don't think it should be it's own board brand, since they'd be poaching from existing brands that Jacob Harris has friends riding for..