I don't think the venue is an indicator lol I mean, yeah, she normally does her finales at Yoyogi, but last year the final dates were initially at Yoyogi and then she added a few dates and the actual final was in Yokohama.
Even if she does extend the tour, I'm glad we'd be getting the footage of both versions of the concert then.
I guess we should wait and see, because all we can do is speculate