Now I have been toying around with this idea for months now and my boy friend said I should either Blog about it or write to Matt Fraction. So here goes with the blog...
 
Ten years ago Black Tom revealed something to us and the other readers of Generation-X, Mondo was still alive. since then we have not seen this mutant and no one knows his whereabouts. Until now! 
 
This is all theory/ fan fiction... but if you look at the clues this could totally work for marvel. 
 
 After Gen-X handed Mondo and Black Tom their butts... Tom wanted revenge on the White Queen. Now the Head Mistress at Xavier's in upstate New York he thought it best to enroll Mondo to keep a close eye on her. Mondo already has complete control over his mutation which is the absorb the properties of things he touches. He decides to take a simple form of grey rock shaped as the Thing.  Mondo now under a new guise, Santo Vaccarro joined Miss Forst's band of misfit mutants taking the code name Rockslide. 
 
Things to consider. 
 
M-Day.
Black Tom After M-Day.
Rockslide/ Mondo Power Base.
Mondo disappearing / Rockslide introduced only 3 years later.
Why Rockslide never has shown his human form, not even in flashbacks. 
No history on Rockslide really has been shown. 
 
 
  Now I have stories I could go into that I wrote and Ideas of why this could be a cool concept. I just wanted other people to think about it is all. My boy friend also pointed out to me last night that when he was reading Nation X .  Rouge touches all the young X-Men to kill the PredX, and when she reforms she looks more like Mondo then Dust.