Recently, I began to wonder: What would happen if the Yeerks defeated humans AND the Andalites, and then came across the Zerg from StarCraft, who had defeated the Protoss and were in the process of consuming the rest of the galaxy? Obviously, war would ensue, but who would be the victor? Let's talk about that.
In my opinion it would have to be the Zerg. After all, they have GIANT tank-like Zerg, Zerg with so many blades they make even the Hork-Bajir look harmless, flying Zerg that even go into deep space, and even Zerg that can BLOW UP. It's never said how the Zerg travel from one planet to another, but I assume they hijack other species' ships.
P.S.: Did anyone ever notice the similarities between StarCraft and Animorphs? The Protoss are OBVIOUSLY like the Andalites, telepathic and possessing no mouth, the Zerg are the Yeerks, parasitic and wanting to consume everything, and humans, like our humans, are just stuck in the middle.