First of all, amazing question. Second of all, we hope not — but we also want the answer to be yes. Think about it. This baby is unprecedented. Only the Original hybrid can procreate. If it just turned out to be some normal baby, that wouldn’t be very exciting.
Some fans have suggested that because it was only Klaus’s werewolf side that allowed him to make a baby, his offspring will be all wolf. We’re not quite sure how supernatural science works; genetically, Klaus is a werewolf. Perhaps none of his hybrid or vampire traits will be passed down. If that’s the case, then we can’t see a were-baby taking out the entire human population.
But if supernatural offspring in pop culture have taught us anything, it’s that they don’t always add up to be the sum of their parts. Twilight’s Renesmee was a fast-growing super baby who walked and talked just weeks after her birth. On Angel, Connor, the child of two vampires, turned out to be superhuman with no vampire face or blood drinking. We could see an Originals twist where the Klayley baby ends up entirely human — or turns out to be some henceforth unknown supernatural creature.
You know — the kind who is destined to destroy all mankind? We’re just saying. It’d be interesting if Klaus ended up saving the world from his own kid. Who knows what kind of demon baby werewolf + hybrid equals?