Board Thread:General Discussion/@comment-28096256-20160413001736/@comment-5398287-20160413011549

First off, allow me to extend a heartfelt thank-you from all the admins and mods for actually reading the wiki pages regarding the topics you're discussing here and using the information present in your theory - it is absolutely insane how many people don't even bother to do that when writing up a theory.

Secondly, if I'm reading this correctly, you're postulating that an Adjuchas can only become a Vasto Lorde if they inherently possess some degree of Shinigami power, i.e. from having consumed a soul with Shinigami powers, and that these are the only Arrancar who can attain Segunda Etapa. Truth be told, we really know nothing about Segunda Etapa and how it works to begin with, nor do we really know too much about how one goes up to the top of the food chain in the Arrancar world - however, given that there is definitely some factor or another that lets some Adjuchas evolve and prevents others from doing so, as well as the idea that Ulquiorra probably isn't the only Arrancar to ever achieve that second stage, this idea doesn't contradict any established facts I can think of and would work with what Kubo's shown us, so...yeah, I can buy it.