The first hint was posted in Shueisha's Jump Remix of the Death Note manga. In the fifth edition, an advertisement was posted on the underside of the fly cover. It stated that there was a 'special project' coming soon to mark Death Note's 10th Anniversary.
That was followed up quite sharply by the appearance of an intriguing website.
The site displayed a countdown towards March 3rd 2014 - the same date heralded in the manga advert as the launch date of the 'special project'. The Death Note website featured a familiar black notebook, with the legend warning us that ' 'If you touch this note, your memory will revive''.
Naturally every Death Note fan in the known universe touched it. It would take more than the cautionary tale exhibited by Raito Yagami to see us off.
Yet all we got for our troubles was an image of Ryuk flashing into view. All...
Mmm... so what it's all about? The main buzz on the internet seems to be that a new edition of the original manga will be issued. But that's been done several times during the intervening ten years. It's already happening with the Jump Remix right now.
Others have guessed that the Death Note anime will be remade. Does it really warrant that? The extant one isn't very old, and it's hardly dated. It's just about perfect as it is.
Could it be a new story being written as we muse in anxious anticipation? Perhaps a stand-alone tale updating us on the fortunes of those left alive, or following through on ambiguous clues that Light himself is now a shinigami. Maybe even a whole follow on series, wherein another person picks up a Death Note and Near scrambles a squad to hunt that new Kira down.
Or another live action movie following another tangent not covered in canon?
The most potentially disappointing scenario I've heard is that it's merely a countdown to an official announcement of Death Note the Musical. But we already know about that. It wouldn't be any surprise at all.
How about you? Have you any major guesses that haven't already been covered here? There's surely little that it could be!