The larger bags (Aeronaut, TS, WF, etc) are in the 1050 ballistic and right now Nebulous is in the lighter weight 525 ballistic...
Never say never, if it's popular enough, maybe they'll get it in the heavier weight.
They also don't seem to use the 210 ballistic as an interior (as far as I have seen) on the larger bags... so 200 halcyon Island would be more likely...