I don't suspect we'll add an impact bat via FA in 2016, but 2017 is a distinct possibility.
We need for at least one of our young players to exceed expectations offensively (Simmons, Bethancourt, Peterson, Peraza, Kubitza). I think this is a distinct possibility, though I'm not holding out much hope for Bethancourt to be that guy.
We have some trade assets that can be used to either acquire offense directly, or indirectly by acquiring pitching prospects to flip. Gattis and Minor are probably the two best trade chips currently, and we could also flip some relievers for prospects this Summer.
I think with offense being at a 30 year low you are either going to have to develop your own or pay in free agency. Known offensive quantities that have any kind of contract length will likely be a massive overpay in terms of prospects. With the Braves trying to rebuld their farm depth I don't really see that being the route they take. So they will need some guys to pan out better than expected and hope they don't miss out in the FA market.