The research in the wild says no, not all males become supermales. I have read (so it must be true LOL)in blue head wrasse that super males are fish that actually became males either very young or were born male, either way, they were functional male while still small and with female color.
The other problem in aquariums is that the males in the wild become supermale by dominance and use pharamones to stop other females and younger males from becoming supermale. This is important because in a fish tank we keep other closely related fish in the same tank and it is very possible that a closely related fish could be preventing the flame from changing to a supermale.
This means that in your tank you have to have all the conditions correct for a fish to change to a supermale, you have to have a fish that is genetically programmed to be a supermale and you have to eliminate all competitors that would stop him from the change.