The G1 is beginning tomorrow (as of this writing) and this would be a good time to look at not only the potential G1 winners, but what it would mean for the WK main event. Below are some of the options for the main event and how likely it is that the individual options will manifest themselves.
Okada Versus Naito
This is my personal pick. Okada is still the ace and there are only two matches that I can think of that would be worthy of the “ace” that are not world title matches. One is an IC title match with Chris Jericho and the other is against Daniel Bryan if he leaves WWE. With that said, it is unlikely that either of those two matches would actually go on last if the world title is not on the line and Okada is likely to be in the main event…so the best bet is a world title match
There are reasons why his opponent may be someone else (to be discussed below). I think it is going to be Naito because Naito is still the most popular wrestler in New Japan. Moreover, if they do not meet in the G1 finals, it will be a year between meetings of the two which means other than the aforementioned potential match-ups with Jericho and Bryan…it is the freshest major Okada match.
Okada Versus Omega V
I have been thinking that if Omega does not stay in New Japan WrestleKingdom would be a great time for Okada to beat Omega and cement himself as the best wrestler in the world (in the New Japan narrative). The issue is that if Omega stays, it would be ideal if they wait as long as they can to do the next match. Then again, it is not the best-case scenario for Omega to go to WWE with a 2-1-1 (or 3-2-1) series victory over New Japan’s ace. The problem is that Gedo is probably not going to have an answer from Omega before the G1 so the options are either quicker than ideal turnaround for another Omega-Okada match or Omega possibly leaves with a series victory over Okada
Naito Versus Omega
This match is happening the first night of the B block. History says that means it is less likely to main event WK. At the same time, if the match finishes in a draw, then the story can be that there is unfinished business between Omega and Naito that they can finish at WrestleKingdom. If NJPW can find a non-world title match that is worthy of Okada…then I think this match is very possible….especially because it is happening so early in the tournament and is “only” going to be 30 minutes at the most.
Omega versus Ibushi
By the time the final night of B block is upon us, many of us will likely have a good idea as to whether or not it is possible that this match will main event WrestleKingdom. I do not think it will, but it is also hard to find a better singles opponent for either of them. If this match ends up in a draw, then an argument could be made that they can have one more match in the Tokyo Dome. One thing to keep in mind is that Omega and Ibushi can have a match at WrestleKingdom without it being the main event of WrestleKingdom.