I think the ten tails was the one who sucked obito in when manito really killed the "real him". Most people will say he do not wish to because he is dumb and being controlled but it is full aware of its thinking cabillites as time went by he produced more stronger and bigger scale attacks is because he has gained a portion of memory, then when he got the chance to get super almost dead obito he bring him back to life via himself with his charkra and life over death just. I see alot of people saying that the ten tails is looking at naruto and as he is trying to become "complete" the 8 and 9 are his primary objectives.