Originally posted by Space M ummy
both agamotto and mephisto are supreme in their own dimensions. Galactus stalemated the one and defeated the other.Shazam is powerful, but not "supreme in his own reality" powerful.
I don't know much about Shazam but he fought the Spectre and killed him. however, spectre did was nothing he just continued to fight and defeated Shazam.
Shazam is powerful, but I doubt he can do more then just fight till the end.