From what I remember, Justice League Antarctica was one of the many, many spin-offs. Justice League Antarctica, Justice League Europe, Justice League International, Justice League Detroit, Justice League Arkham during a weird spoof period, Justice League Apes during that same period, etc...
I don't think I ever actually read Justice League Antarctica, though. I agree with your pick for Professor Stein, though--Anthony Stewart Head would be great.
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I don't think I ever actually read Justice League Antarctica, though. I agree with your pick for Professor Stein, though--Anthony Stewart Head would be great.