lol that still sounds bad, I mean, I expect the result to be a lot better than what I can draw (which is saying quite a bit), as the evidence of such is in the person's post.
Though once it is finished, the banner *might* give spoilers away if it is identifiable, though I doubt people would recognize bits of it. And if they did they might also get it wrong. Needless to say, once I encounter a certain point in my fic, then readers will be like "Oh that's why there is that in his sig".