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.
To commemorate the upcoming 22nd anniversary of the Tales of Series, Bandai Namco Japan will be holding a special program with (hopefully) new information!
Smartphone game pre-registration platform Prelaunch.me has apparently leaked the upcoming English release of Tales of Link, along with a pre-registration bonus.
Bandai Namco's Asia website had listed Tales of Zestiria for the PS4 and PC with October 2015 release dates, but have long since removed it at the time of posting.
Well, this is a surprise. Bandai Namco Asia's Facebook account just hinted that they might actually be commenting on certain Tales rumors at this coming Tales of Festival.
In a latest interview with Tales Series Producer Hideo Baba, he mentions that Sorey and Alisha from Tales of Zestiria are fixed party members in battle, possibly.
UPDATE (04/14/2014): Gamestop had the game listed on their website earlier today, but it was taken down within an hour. This is what the entry looked like (thanks to cutepresea for the screenshot):