Four new cards for the OCG are confirmed to be in this issue for the Extra Pack

Sea Monster of Theseus is EP17-JP048 テセウスの魔棲物 Theseus no Maseibutsu (Diabolic Dweller of Theseus)

Tornado Dragon is EP17-JP049 竜巻竜(トルネードラゴン) Tornadragon, and is one of the Ultra Rares of the Set.

Juno, the Celestial Goddess is EP17-JP053 天空の女神 ジュノー Tenkuu no Megami Juno (Juno, the Celestial Goddess)

Shelga, the Tri-Warlord is EP17-JP054 異界より来たるシェルガ Ikai yori Kitaru Shelga (Shelga from Another World)

Source