Though Jim Lee's sketch of Goku is only in pencil, it's clearly the Super Saiyan Blue powerup of Goku.
It's probably a safe bet to say that Jim Lee was an avid watcher of Super if he picked Super Saiyan Blue over some more widely known transformations such as Super Saiyan and Super Saiyan 3.
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After providing the Goku sketch, Lee responded to one fan's request that he draw Saitama next.
Perhaps we'll see a Jim Lee manga one day in the not-too-distant future?