Will I follow through and make a book of it?
Like I said, probably not.
I know how it more or less begins. Sam gets attacked by a phantom, fends it off, develops their illusionary energy superpower, and then the timeline splits off of their decision to use that power for themselves (the path of the supervillain) or for the good of others (the path of the superhero).
I don't have an exact setting, the details of Sam's life down in the background, or the plot once they do split. The challenges facing the hero and facing the villain.
But hey, this is more than what I had!