A video has leaked onto popular video site Youtube, detailing an oncoming invasion of Tokyo. Words cannot convey the severity of the issue, so I implore you to watch the video, which can be seen further on in this article.
In the above video, you will see that the Squid Girl herself is announcing that her invasion will begin on September 26th. The song in the background is performed by the group Sphere, so it seems that they are indeed in cahoots with the culprit at hand
Source: Japanator