With character designs that complex and trying to fit four characters into such a short comic on such a tight schedule, I'd definitely say that's a concern.
Don't get me wrong, this art is absolutely gorgeous, and they'd be great designs for a videogame (where you only have to draw or model an asset once, not five times per page like a comic), but if I were you, I'd seriously consider making simplified versions of these with a lot fewer lines for a comic, particularly when the top prizes can only be claimed if you sign a contract to keep making that comic for who knows how long. Don't put yourself into a situation where you end up burned out and exhausted from having to redraw really complex characters over and over.