Danzo was selected to be hokage after pain invaded, and tsunade fell into a coma, but he ran of from the kage summit and has proven himself untrustworhty ,and thats pretty much up to date, we dont know wahat happens yet, cant wait to read the next chapter.
Yeah after that little ANBU incident.* He barely moved at all.
I see you're point he's strong,but is he s rank? remember he cant just be srong for one minute and pass out in the next,we dont know his full powers yet and i cant wait to see it,who knows i might be surprised like i was with Chiyo from the sand (Sasori's grandmother,in case you forgot).