So, Adonalsium shattered long ago, and the Shattering was witnessed by several people, one of which we know is Hoid. From this Shattering there came 16 shards, each with an Intent. All of these events occurred in the shared universe in which all of Brandon's fantasy books are set: the Cosmere. But how do we know that Adonalsium was ever truly whole? What if Adonalsium was a Shard of something else, a bigger/more powerful entity?
If so, what then?
Well, we know that there is an opposing force to Adonalsium, the "big bad" enemy. But if that's true for Adonalsium, then what if there was one for the bigger thing before it shattered? What if the "big bad" isn't really the big bad, and there is a bigger big bad?
Just some random theorizing. Was bored. Feel free to shoot me down with a WoB.