Eric posted this on Reddit
Free:
Breach Mode
Graphical Enhancements
UI Improvements
Maps
Other things we can show you later!
Paid:
New unannounced PvE mode.
Heroes. You can buy Marching Fire (price not announced) and it gives you the 4 Wu Lin Heroes (plus everything else) and you have a limited time access to the Heroes for a window of probably a couple weeks. We haven't locked down the exact window yet. After that "early access" window, you can unlock each character with Steel like any other DLC character.
I am guessing that means real $$$, at the same time everything everyone needs to be part of the full game outside of one co-op mode friends might do separately is there, this is something not unlike Destiny's new missions or within Ubisoft a Division expansion. Might well be nice for them to have that for free but given it isn't part of the PVP loadout, I also don't mind them trying to make money on something they claim they want to support for years.
Personally I have bought gold edition on two platforms and for the work they have done on making it more stable and what they give us for free or in game currency I won't hesitate at buying early access to the heroes or the new co-op.