There’s at least one alternate universe in which Mister Sinister founded the X-men; but the only detail I remember is that their costumes are WAY fancier. (Uncanny X-Men #241)

One comment

  1. Robert Karol says:

    here’s a link to some images/summaries from the WHAT IF? where Mr. Sinister formed the X-Men: http://www.marvunapp.com/Appendix3/earthsinisterxmen.htm

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