He may have simply wanted a new Jinchuriki to guide the world: ie, Naruto, the 'guy [he] was talking about'. In any case, it is 100% certain that the Rikudou did not want the Juubi revived with all it's chakra and it's own body, so giving access to the body at all when a jinchuuriki can be made using only chakra is pointless and dangerous, and therefore not likely to have been something done by the sage.
We have no idea if and how the Rikudou could have made the Juubi's body into a summon that is tied not to himself but to anyone possessing a Rinnegan, but I'll let that slide because that guy is pretty much a god.
What you say is possible since it's clear that the Rikudou anticipated other Rinnegan users after himself, but I can't imagine why he would allow such easy access to a key piece required in reviving the most dangerous thing in the Naruto world to literally anyone who gets a Rinnegan. You can rip it out of someone else's eye socket, as Tobi did to Nagato.
I'm almost certain that the thing you quoted was actually the prophecy to Jiraiya, which was referring to Naruto and not the Rinnegan.
To the P.S. : The Rikudou would never have wanted the Juubi's body to be used as a weapon of destruction, by himself or anyone else. Those shackles, should he have made them to restrain the Juubi's body, would not come off using any methods available to the likes of Tobi.