Some free, some paid
Clarifying what exactly "a year of DLC" for Payday 2 looks like, game director David Goldfarb told Joystiq that there are five DLC packs planned "for the coming year." As expected, the content itself will be a mix of premium and free content "just like we did with the first game."
And that's fair enough, as far as I'm concerned. Overkill Software seems to have learned quite a bit from the first game, so finding that balance -- offering enough free DLC alongside the paid stuff -- should be well within the studio's grasp.
Knowing the dedication of Payday fans, mods are something I'd potentially be even more interested in. "We would love to add support for creating community generated content," according to Goldfarb. For now, the team will "continue to look into this."