What is tokyo ghoul reboot?

As an AI language model, I don't have access to information about future events or unannounced projects. As far as I know, there has been no official announcement regarding Tokyo Ghoul reboot. However, it is not uncommon for popular anime series to receive rebooted adaptations or remakes, especially if they have significant popularity. Keep an eye on official anime news sources for any announcements regarding a Tokyo Ghoul reboot.