She really is the only one on team 7 who still hasn't surpassed her master (tsunade) yet. I mean seriously we always knew she was a useless bitch who cried all the time and weighed everyone else down with her expectations but she has had a decent amount of time since Sasuke and Naruto did it and...
Context: Madara said he had the Rinnegan right before he died. Madara also has both EMS. Tobi told Konan that HE gave Nagato the rinnegan and so he is taking what already belonged to him. Following conclusion can be drawn about various things (according to me).
About the Rinnegan:
Nagato's...
They might exist but they aren't explained if they do I think its more of a '??' than a definite that they don't exist. That said there could be a fundamental drawback in these elements that a future databook might make clear.
I have been browsing some forums here lately and I cannot understand why the Tailed Beast Mode is so often called the Rikudo Mode. Is it just the Magatama?