^ What some people fail to see is that MM must use the absolute peak of his abilities in tandem in a way he hasn't even come close to doing. Ever. If he went intanible tangible so quickly and zipped around at super speeds and merely punched him with half-strength, the tactic would fail because WWH is super-durable and gets more durable as you anger him.
Should MMH then focus on super strong shots at full strength and use his super speed zippin about, and only going intangible-tangible seldomly, then one AoE thunderclap can counter that.
Should MMH decide then to use his full strength shots and his tangible-intangibility without superspeed, then WWH can telegraph his punches and defend or counter accordingly.
Those are semi-realistic scenarios, even though J'onn still hasn't demonstrated one single feat of the above other than tangible-intangible + super strength w/o superspeed. So where do these tactics leave MMH when he goes up against a super-strong, super-durable, relatively quick (to the point where his speed completely belies his size) with a super-healing factor who gets amped in all respects the more you anger him?
MMH is left with martian vision from afar and that aint going to cut it. At all. And his telepathy cuts MMH both ways, and if it fails and causes backlash, then he'll be in great danger of being pounded.
So what now? 😐