What about all those villains that Cronos might recruit? Them + Cronos would make a deadly combination. What if the brother hood of mutants decided to work with Cronos who are purely devoted to more or less, mutating humans into Zoanoids? Loki of Asgard might love what Cronos, along with Apocalypse as they are worshiped as gods and might find themselves content on control portions of earth (they've done it before). Norman Osborne wreaks of becoming a new head of Cronos America. Several villians would simply want the power, even if they know about losing the ability to control their will. There are so many others out there. This can tip the balance. Though, should be noted that many villains might appose Cronos too. Namely Dr.Doom.