The Green Lantern hype train is firmly back on track this week, and the first big bit of news reveals who will voice some of the many CGI creatures in this DC Comics adaptation.

Geoffrey Rush is confirmed as Tomar-Re, a gilled, goldfish-headed creature from the planet of Xudar. Tomar-Re is a scientist who works alongside Hal Jordan (Ryan Reynolds) as an intergalactic member of the Green Lantern Corp.

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Michael Clarke Duncan is rumored to be playing the gentle, yet frightening giant Kilowag. At this time, he is a contender for the voice role, but the studio has yet to make a final decision on the actor. More casting announcements are expected soon. Finalization of visual and 3D effects? That may take awhile.