1 - Doop sits at a card table, a determined expression on his face as he floats above his chair. I feel like it wouldn't be out of place for him to have one of those silly looking card visor hats.
CAPTION: Earth's only hope.
2 - Pull out to show Doop sitting at a round table with three other mean looking characters. There's a huge minotaur-esque alien (who is multi-coloured and maybe has lasers for horns - think a psychodelic C.O.W.-Boys of Moo Mesa but way meaner), a translucent creature that appears to be made almost entirely out of tentacles, and a classic boxy looking robot (also mean). Another alien stands next to the table as dealer, dealing out some cards.
CAPTION: A spot he knows all too well.
3 - Close in on Doop again, he holds his cards close, a worried look crossing his brow. Maybe throw in some beads of sweat (assuming Doop sweats).
CAPTION: But everyone falters eventually.
4 - Back to the table. Doop asks a question. The minotaur responds insolently (in body language and words). Cards are spread all along the table top, face down.
CAPTION: Is today the day?
DOOP: [completely incomprehensible Doop speak]?
MINOTAUR: Go fish.