The "Big Bank" update features the game's largest heist to date, the Benevolent Bank -- along with bigger / better vaults; guards; rewards; and a brand new contact, The Dentist, played by actor Giancarlo Esposito (Breaking Bad, The Usual Suspects). But before the heist, players can "case" the banks in a new team "pre-planning" phase that provides bank blueprints and heist power-ups, such as get-away drivers or better weaponry to ensure a successful job.
The team says that you can fit 10 Harvest & Trustee branches inside the Benevolent Bank or an entire Robert's Bank inside the vault alone. You also get the preplanning feature, the Falcon Rifle, four new masks based on the forefathers, four new materials, four new patterns, and 10 new Steam achievements with in-game rewards.
The DLC will run you $6.99 (USD) from Steam.
The shear number of options you have in the pre-planning is amazing, but you can only buy some features based upon how many favors you have. It's an interesting dynamic.
I can't imagine trying this map with random folks as it's pretty complicated.