According to Alan Dean Foster's novelization of Star Trek
, Old Spock was gonna make his future knowledge freely available. Bob Orci said on Trekmovie around that time that that was an addition of ADF's.
According to issue #15 of the Star Trek Ongoing
comic (with it's Observer-like Bad Robot Bob Orci OversightTM), he's keeping his mouth shut, citing a non-interfence directive.
From what I gather of the unreleased novel The Hazard of Concealing
, Old Spock was keeping his mouth shut in that too, although word about him gets out and all hell breaks loose, with several Alpha Quadrant powers coming after him for his juicy future knowledge.