He leads an evil organization (Nod and Team Galactic) which seeks to use a certain object or entity (Tiberium and Dialga and Palkia) to achieve a goal (Ascension and creating a new universe). Oh, and they both go through the portal at the end of their respective saga.
Ketchum's corollary to Clarke's Third Law: Any sufficiently advanced tactic is indistinguishable from blind luck.
Moving to the Crossover page: