Unplug freezer. Remove everything else but the frozen turkey. Brine the bird right where it sits in the freezer bottom submerging the bird totally in warm brine.
Afterwards, once you get a floater remove bird and use a length of hose to siphon the brine out
And thanks for the inspiration, I have a couple of frozen 30 lb hams that are too big for my brine lug. But I could do both in the bottom of my little chest freezer.