First, five cards from OTS Tournament Pack 25 have been revealed:

Exodia the Forbidden One, Snake-Eye Ash, and Diviner of the Herald will be included as Ultimate Rares. Fire King Island (rarity unknown) and the Infernoid Token – making its debut in the TCG – are also included in the set.

Next, in Battles of Legend: Terminal Revenge, the following five cards have been confirmed in the set (EDIT: These seem to be Quarter Century Secret Rares, but were initially mistakenly reported as Ultra Rares owing to the image quality):

BLTR-EN??? – Dragon Master Magia 
BLTR-EN005 – Lancea, Ancestral Dragon of the Ice Mountain
BLTR-EN010 – Repair Genex Controller
BLTR-EN013 – Infernoid Evil
BLTR-EN017 – Spiritual Beast Tamer Lara

Source: Yu-Gi-Oh! EU Twitter