What is the Malthar doing there?

I was doing some research on Gamma World today, and as I was looking through the 3rd edition Gamma World rulebook, I came across the Malthar sitting on his hover thingy on one of pages of the rulebook. So after the shock of seeing him there I started thinking of reasons why the Malthar would show up in Gamma World.<br /><br />Could he be hiding out there after the Dramune incident?<br />