Planetary is like the ultimate in prep. Not necessarily in sheer power, but just in terms of cerebral strategy. I'd put them above any team I've ever read about in comic-dom given all their resources and even a small window of time, probably including prep powerhouses like the FF or Defenders.
However, in standard KMC matches there's no prep. And the thread starter specified none. XMen for the stomp.
Agreed. But then again, the op doesn't specify a particular x-men roster. Planetary could take some x teams down in a straight fight.
On a related subject, people interested in planetary should check out the vs fantastic four thread I created.
Is this kind of shameless spamming against rules here? I'll stop, if it is