The teaser site is also related to Magical Mirai 2014, though it is still not known what the teaser site will be revealing as it has announced that something will be revealed on Wednesday, August 27, 2014.
As it is related to Magical Mirai, the Miku silhouette somewhat looks like the artwork for the Magical Mirai 2014 events in Osaka and Tokyo. Can you see the similarities?
There are already some speculation as to what this PS Plus teaser site is really announcing on Wednesday, with some already speculating that Sony will be streaming the Osaka event and the Tokyo event for free exclusively for PlayStation Plus members, but as the official announcement has not yet been made, we can only speculate.
The Osaka event will be held on August 30, 2014 over at the Intex Osaka building 5 while the Tokyo event will be held on September 30, 2014 over at the Tokyo Metropolitan Gymnasium.
Source: Sony PlayStation Japan