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As others have mentioned, writing a prologue from a different POV than the rest of the story is common enough. The part I'm not sure about is writing the prologue in first person, while the rest of...
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#4: Attribution notice removed
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/38977 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
As others have mentioned, writing a prologue from a different POV than the rest of the story is common enough. The part I'm not sure about is writing the prologue in first person, while the rest of the novel is in third person. First person feels "closer to the character" than third person. So you'd be making the reader feel closer to a one-time POV that we don't see after the prologue, than you ever let him feel towards the actual protagonists. That feels a bit strange and confusing to me. If you're writing all the novel in third person, I would also write the prologue in third.