So, all this glorified Maintenance did was to bring out a 3DS stability update which patched all of the known 3DS Exploits for running Homebrew. So, the more I sat down and thought about it, I don't see the Octolings being released tomorrow. Wouldn't Nintendo hype the heck out of them? I mean, we know they're in the data but, Nintendo could still show them off pre update by showing us clear footage of them doing stuff.
The only way it's happening tomorrow is if they went for the only surprise tactic they know how: By not saying anything until just hours before the update drops. But even I see that as unlikely. I mean, that's how Pirate Ship was revealed in the Mario Maker stage update in smash along with Mii Costumes we had no idea of existing until then.