I can't imagine the PL for Superman. The old DCU RPG was on an exponential scale so Supes had a 50 strength compared to the normal person's 2 (I think it was 2). But the M&M stats are relatively linear. Supes is supposed to be orders of magnitudes stronger than a normal. And that's just one of his many powers. I don't see this as a good fit for stock M&M.
Not that I doubt Steve Kenson won't figure out how to do it. But I don't envy him the task. You know someone will criticize how they interpret Superman or Batman or Grow-Arm-Hairs Lad (er, he's not DC but you get the idea).
Great going, GR.