The Pokken Tournaments’ official Japanese twitter account has announced a new challenger will be revealed for the Pokken Tournament Arcade November, 1.
アーケード版「ポッ拳」に、新たなバトルポケモンが参戦することが決定！
11月1日20時からのニコニコ生放送で大発表！お楽しみに！#ポッ拳https://t.co/UxRljq3YL9 pic.twitter.com/MSM4zyNMTC— ポッ拳 公式アカウント (@pokken_official) October 28, 2016
The arcade version recent added Scizor earlier this month and Darkrai in July. No news has been announced if any of these characters will be joining the Wii U version.
New Challenger Gaming 