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The original idea for the movie was a Crossover Cosmology with Tiamat waging war against the Greek pantheon and Perseus being assisted by Thoth, Osiris, Marduk and Yahweh. He would also apparently have a romantic affair with some "Cthonian Earth goddess." (The filmmakers apparently have something against Andromeda for some reason...)
Wrath of the Titans
Actor Allusion: Not only does Hephasteus sound a bit like Davy Jones, but has the scraggly beard from human!Jones and even says "release the kraken" at one point (in reference to the first film).
At the end, Zeus is basically using the Force on the Makhai and Force Lightning against Kronos!