Yes, it is the OFFICIAL version

Here is the first page:

You can find out more on this reddit post, including email with one of the people who works on the official comic and a preview of a part of the script.

  • @Feathercrown
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    5 months ago

    WHAT

    The day of prophecy has come to pass. All TF2 players please report to your nearest mountain so you may ascend.