Jervis Johnson talks about armybuilding in 7th ed. with some screenshots of the new rulebook.
Amongst other bonuses a Battleforged army will recieve a reroll on the Warlord table as well as their troops gaining the Objective Secured special rule. It's the same sort of rule as Gargoyles in the Skyslasher(is the name right?) formation that always score over other scoring units unless the other scoring unit have the same rule.