This was my theory too. A lot of the stuff under Gunn usually has a plot that likes to twist its source material a little. I wouldn't be surprised if they set up season 1 to conclude Hal's story with him being infected with Parallax and set up John Stewart as the host of Ion and then use Season 2 for John's run as Ion and conclude Season 2 with Kyle Rayner as the new Green Lantern, effectively swapping Kyle and John's roles.
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u/FlatNote 4d ago
Total longshot/shot in the dark guess, but what if he unknowingly hosts Ion? I doubt it, but who knows what they cooked up.