I don't think you can do anything to superman if he can reversal super. If you do the cancel perfectly and are at +9 and try to do like d1d2 or 112 or 21 (all of these are 9f or faster), his super is so fast that it will armor through the first hit and grab you before the second comes out.
I'm not 100% certain about this, but I think if superman has super loaded up, you basically can't press buttons against him even if you're at plus frames.
Against normal, non-armored stuff, I am able to do b22 RMSC, 21 or 112 or d1d2 or d2 against 6f reversals (corps charge, sword spin) and stuff them (or trade if I'm a bit off).