Does that mean they skipped Battle and Romance? maybe it's first half of the show all the singles (ending with new single? *daydreaming*) and then the other half to sing other songs.
A bold concept, but potentially rather weak in musical terms.
They've framed this as a milestone concert for a while, so it makes sense to start with a narrative. Fanvids gearing up for Kokuritsu have been doing the same thing – showing them performing in Yoyogi Park and all subsequent performances in order. So many fans were wishing that Akari would join them for this concert. I take it "Never-ending Adventure" means pausing to look back before embarking on the next leg of the journey. It makes sense that they'll perform the new single at some point this weekend – hope so, anyway.