I think it'll be "Outriders"

IGN posted an article saying SE just filed for the trademark. The last time IGN had a similar article it was several months before NA Fanfest, and guess what, the article was about SE filing Stormblood as trademark name. Sure enough, we're several months away from NA Fanfest.

http://m.ign.com/articles/2018/05/20...-for-outriders