Though Renji meets the criteria for a Captain as far as having a Bankai. He would still have to go through the Captain's Examination and pass (or one of the other methods for obtaining Captain status). So it is unsure if Renji would actually be Captain's "material" and pass the examination, as far as the other qualities required to be a Captain goes.He wasn't nominated as one nor did he take the test to be one neither that he has no intention to be ....