With a week until Tales of Festival 2018, Gematsu discovered a placeholder URL entitled "http://tov10th.tales-ch.jp/" online, but it's password protected.
Also, Gematsu's article states that a Vesperia remaster may be announced during E3 2018 next week. We won't know for sure what'll happen with this URL discovery, so we're only labeling the Vesperia remaster report as a RUMOR. Whatever happens, the likelihood of Vesperia news occurring during Tales of Festival 2018 has increased based on this URL's existence alone.
Tales of Vesperia
Tales of Vesperia is the tenth mothership title of the series initially released for the Xbox 360. The Japanese and North American English localization release dates of the game were within the same month, a first in the entire series. It later got ported to the PlayStation 3 with additional features, but this never got an English release. An updated version known as “Tales of Vesperia: Definitive Edition” will be released for both Japan & the West in Winter 2018. Vesperia tells the story of Yuri, a former Imperial Knight. A movie called Tales of Vesperia: The First Strike was later released which tells the story of Yuri prior to the game’s events.