Odds are for him to sign with the Titans. I think the kicker will be the post-career / management / ownership offers that Adams "apparently" put on the table.
IMO, it comes down to a short term versus long term decision for PM. The Titans are apparently offering up a lot of enticing long term intangibles while the Niners have the lure of a Super Bowl favorite with PM on the roster. The ponies have fun-loving conversations with Elway and money to offer up, not much else.
Word is that PM and the family are celebrating their 11th wedding anniversary in the Smokies this weekend -- probably discussing who to go with, I imagine.