the answer to this question will clear up alot of things!!

[iamdsixth]

and another thing... nagato didnt know abt the real madara, tobi introduced himself as madara cause when itachi and nagato were brought back using edo tensi they still addressed tobi as madara.. and thus i think that pein didnt know that he had to ressurect madara

C'mon,realy?!!! why do you think Madara took Obito under his wing? Let me answer that for you..
"To ensure that Nagato ressurects him." OMG

 

[Sasuke RKO]

C'mon,realy?!!! why do you think Madara took Obito under his wing? Let me answer that for you..
"To ensure that Nagato ressurects him." OMG

im not sayin that wasnt the plan. bt pein just didnt know abt it