Well, the setlist won't be too different from the regular tour setlist, based on recent graduation concerts. But I am sure they will throw Harunan some bones at both Budokan dates, like they did with Haachin. There aren't performing any unit songs at this tour, which is why I'm assuming the TGL performance was the last one. I would like to be proven wrong, though.
Makes sense and your assumption is perfectly reasonable. And also, since the beginning of her tenure, there aren't many songs that Harunan has solo lines.
And usually she won't get solo lines in the first part of the songs, so if they are not going to perform songs in full, I doubt the changes to the setlist will be any drastic.
And what they should do is do a medley of 6 songs where she sings with members of each generation for each song (9th, 10th, 11th, 12th, 13th and 14th).
That would have been a nice touch and recognize her efforts as being the longest sub-leader.