If the end goal is for Kenny Omega to be the one to end Okadas reign at WK13. Then before that, I think Kenny should win the IWGP heavyweight tag titles with Kota. Doesn't have to be a long reign. He drops it at least before the G1. He wins the G1 againn. During the celebration he States he has one thing he must do before he challenges Okada again. He wants Goto's NEVER title. He is hell-bent on winning that title before WK 13 because not only does he want to be the one to end Okada reign, he wants to be the man who is the only person to hold every single active NJPW championship, and he wants the Heavyweight title to be the crowning Jewel. So he wins the NEVER title, again doesn't have to hold it long.
And at wk13 his entrance is him holding replicas of every belt on him. The two taf team titles over his shoulders. The 6 man around his neck. The ic, us, jr , and never belts hanging off his pants John Morrison style. Holding two mini versions of his g1 cups And on his waist is an outline drawing of the iwgp heavyweight championship.

He graduated from The Junior Division

I know, but he still held both titles. Like I said it's all replicas of all his accomplishments. With the iwgp title being the final gem he would need to be a ultra crown champion

Right now he only has three titles to win before he can say he is the first and only man to win every single active njpw belt.
NEVER open weight, Iwgp heavyweight tag team titles And the IWGP heavyweight title.

Right now he has: Jr heavyweight, Jr Tag team (2x), Iwgp ic, IWGP Us, and The Never 6 man championship.