RnRC tour is my favourite; I love circus theme, but yeah, I agree it's overused.
What about a terror theme? Not terror like SAW, but something dark that intrigues the audience (marionette and ourselves would be near to the line I'm talking about). With special arrangements of all tracks, a lot of rock songs, ballads turned into something darker, including old, underrated and never-performed-before songs in the setlist, dancers dressed as ayu trying to confuse us, a big and creepy scenery, a lot of mirrors on stage creating a labyrinth for some song (don't look back, maybe?), a recreation of a mysterious forest, etc. There would be a lot of symbolism, MVs along the whole show, and definitely, nothing similar to the old
"oh you love me / oh you leave me / oh come back to me shuya / oh, you disappeared" formula.
Ayu would have dark hair (maybe a wig with a REALLY long hair? like creating a river of hair or something like that xD), and would wear new and amazing costumes, following the line of these references:
In one song she would be singing alone in the catwalk without moving her body, expressing everything only through her face. Like, she's SO terrified that she can't move, and in the end there's an unexpected twist that make us going crazy xD
Also, it would follow a story through the whole tour, being every date a chapter (but they would be also conclusive; I mean, if a person goes to a 1 single date, he may not follow the whole storyline, but is able to enjoy and understand that single chapter as well). The DVD would contain EVERY one of these chapters, and a special photobook featuring the firsts sketches of the idea, the search of the costumes, random things, and a small diary written by ayu explaining how the idea for the tour was born, and how it evolved until taking its final form. Ok, I better stop xD
PS: Btw, I love how she looks here ♥