from what little others have told me about MM he's more in control of his full scope of power than xavier but if the fight is an intense one and the mental blocks xavier has breaks down his telepathic power is pretty much unmatched
__________________ Doom is what Luthor wants to be when he grows up.
I don’t believe Xavier was half of Onslought. Or equal to Onslought.
Onslaught was energy manifested in a physical form. Xavier manipulates telepathy at high level yet, he can strain his physical body with overloading or exceeding his capacity.
Simply put it, Onslaught is not hindered by a weaker vessel, thus tap father into his TP power for long periods of time.
Xavier has channeled the thoughts of an entire world. An alien world no less as all can see from the scans a few pages before. Xavier also managed to defeat and drive away Ego during 'Maximum Security,' with some assistance from a young Skrull mutant. The exact circumstances elude me, but he was able to manipulate the young Skrull's mind through subtle shape-shifting of his brain to act as his conduit and then he literally fried Ego's synapses. Xavier has also defeated artificial intelligence with his mind, which was something I didn't think possible. Among other things, in 'X-Men: Genesis,' Xavier was able to train a group of X-Men for months, in the space of several hours. He's also shown the ability to transfer his consciousness to other bodies. His original body died and he transferred to a clone.
Finally, the guy has turned out ot be a grade-A a$$hole. I'm not talking about Onslaught. He had an original X-Men team go in to Krakoa who died. One of them was the third Summers brother and he covered it all up from his students. He also learned that the Danger Room had achieved sentience and wondered what was going on, but decided he needed his students trained rather than free the consciousness which lay within and kept it trapped for years. He's utterly ruthless in my honest opinion. Considering he has no problem with mass telepathy, or problems with alien minds (shapeshifters even), or even artificial intelligence minds... I think Xavier would give Martian Manhunter serious problems. If you add in the existence of the Astral Plane into the battlefield, I don't see him losing. The lowdown: he's got planetary scale telepathy, he's defeated cosmic beings and he's defeated artificial intelligence.
Martian Manhunter as far as I know still has an aversion to fire in an abstract way. While physically he's alright, I believe in the Fernus stoyline, he is still weak to psychic fire or somewhat. This was out of the words of MM himself. Sounds like a vulnerability to me. He's also been shown to have limits. I think it was Despero whom he was able to trap in a wish-fulfillment scenario, but he exhausted this ability by using it only once. I don't believe there is an exact equivalent of the Astral Plane in DC, but there ought to be a similar analogue, where mind > substance. If he can access and tap into it personally, then I believe he has a shot. Otherwise, I say Xavier finds this psychic fire weakness and takes him out, with or without the assistance of the Astral Plane.
He's not vulnerable to psychic fire. He's vulnerable to "flames" of passion. If a house is burning and MM is standing right in the middle of it. He suffers no pain. However if a family is trapped in the burning home, he'll suffer psychic backlash.
Unless Xavier is willing to torch is own mansion full of students...
MM also channeled the thoughts of the entire world. On several different occasions. Xavier used every last ounce of psychic strength he had to do this feat. MM? He beared no strain whatsoever.
MM has made contact with every single being in the DC universe and coalesced their psychic energy to serve as a shield against Solaris. EVERY single being.
He also managed to breach the Overmind of Heaven a feat that was only reproduced by the Great Evil Beast alone. He literally breached the consciousness of GOD.
He also managed to make psychic contact with the Source and fuel the psychic energy of all those who have passed and returned to the source to defeat his brother Malfic and to pacify Darkseid.
He also clearly has no strain scanning the world and reading the thoughts every being simultaneously daily with no repreccussions whatsoever. Xavier? He continually needs Cerbero to accomplish such a feat.
MM also possesses nearly ten thousand years of psychic combat experience from a race of beings who lived and breathed telepathy as it were first-nature. Xavier? He had to learn by himself. MM? He absorbed the psychic knowledge of EVERY Martian (except the current ones that are still alive...) and added THEIR power to his. His race counted in the MILLIONS. He possesses the psychic raw energy of MILLIONS of Green Martians.
He also defeated the Martian God H'rommer. H'rommer is considered by the GLC corps to be the most powerful psychic being alive. A being who can alter the Astral Plane to his will as if he were God.
Artificial intelligence if of no matter to MM. He's mentally controlled the likes of the Metal Men or psychically KOed Red Tornado.
Mass telepathy? Try mass telepathy against hundreds of White Martians who are incredibly skilled TPs themselves. He mindwiped them all.
Cosmic beings. MM has psychically battled God's Wrath....
Xavier is simply outclassed.
He's facing an opponent with FAR more experience, FAR more psychic resouivers (he has his ENTIRE races' psychic energies to call!), FAR more versality, and quite simply is better than Xavier in everyway.
It's like a pretensious unlearned martial artist who is talented but self-taught against a master who has been trained since birth by the best of the best.
MM: Superman. I've just mentally scanned the entire Earth and several of our neighboring galaxies. Despero is nowhere to be found.
Xavier: I cannot find Pyro and the Brotherhood in Scotland. They must be elsewhere. Storm, take me to the Blackbird and I will use Cerbero to find them.