I am not a fan of the alternate universe stuff either but this sounds different. If Major X is revealed to be an alternate version of an existing character than that is a waste, but if he is a brand new character, bringing in a brand new element for others to play with in the future, and likely a brand new villain, that is awesome. That is the type of stuff that let's others take those new ideas and do something with other characters.
Besides, none of you want Liefeld touching any of your neglected faves anyway.