Board Thread:Questions and Answers/@comment-25199543-20140719134821/@comment-11051098-20140723030320

Nothing really says that it's a constant Shikai-state.

When Kenpachi picked up the Zanpakutô from the dead Shinigami, it could have been a recently joined unseated Shinigami and a basic Asauchi whom he had not yet formed a bond with. From what I can see in that panel, the sword looks plain and unshaped. We've all seen that the sealed state over time becomes unique to each individual Shinigami. The jagged, worn blade Kenpachi's had for all these years might just be his sealed state. What's to say that he knew enough about it to actually say it was in a constant Shikai-state?

Besides, the giant ax which has an actual release command, as well as the fact that one has to know the Zanpakutô's name to be able to achieve a Shikai release, contradicts the possibility of Kenpachi having a constant Shikai up until he learned Nozarashi's name.

There's no proofs, theory and speculation only, I clarify that, and I know that the wikia only go with official information, but you get the point.