Albatross

Upon closer examination, Harry appears to be wearing a pendant around his neck. Salazar Slytherin's locket, by any chance?

You two are worrying about the quality of the art, rather than examining the image for clues. For example:

Neither figure is holding a wand.

Harry's scar is obscured by his hair - is it gone? Is it there? We can't tell. Such things are not accidental.

They seem to be in an outdoor arena, observed by an audience. How the heck THAT would come about I have no idea.

The ground beneath their feet appears shattered, broken. Is this emblematic of what Voldemort's war does to the world?

Harry seems to be summoning something, Voldemort seems to be warding it off. Whatever it is seems to be small enough for Harry to catch in his hand. What could it be?

Are the curtains symbolic of closing the curtains on the story, or will the pair battle their way onto a stage at some point?

There are a million clues here, down to the 13 figures in the audience, the seven pillars, and the nine archways. None of that gets into an image like this at random...