#7 X (El Phantasmo)
In the tournament announcement, there was a surprise performer just referred too as 'X', but given the hype around his New Japan and Bullet Club debut, that new performer is almost certainly Canada's ELP (El Phantasmo). The Canadian has been a superstar for years now, but it was only when he ventured off to the UK that he finally made a big splash, and that splash was evidently big enough to attract the attention of the right people in Japan.
Speculation has begun that X could indeed be the return of Hiromu Takahashi, and if that's the case, he would certainly be higher on this list, but it's 99% likely going to be ELP, and he needs to make a great first impression. With 2 juniors in Bullet Club already, the Club have a great chance to take out a win here, and while ELP will blow the mind of New Japan's audience, we just don't see him taking out the crown first go.