While Homefront on the last gen consoles had an interesting premise, where North Korea successfully invaded and occupied a large amount of the continental United States, the game failed to stand out from a gameplay standpoint. In Homefront: The Revolution though, things are promised to change. For starters, there will be a co-op element to the campaign. Furthermore, it is implied that the campaign will be somewhat open world, letting you find and set up raids on North Korean outposts, ammunition dumps, and things of the like.
The game itself takes place a little bit after the events of the first game, and it is clear that the United States did not manage to push the North Koreans out of the area. Miniaturized scanning drones, raids and public executions, and an enslaved populace working in factories to produce equipment for the North Koreans all point to an even more harsh occupation, if anything. Fortunately, you can fight back, this time with your typical guerrilla warfare tactics and weapons like Molotov cocktails and phone triggered IEDs.
The gameplay itself is fairly run of the mill, being a first person shooter set in the modern era. Similarly, your enemies will have things like riot shields (as befitting their role as an occupation force), drones, tanks, all the works of a modernized army. To combat this, you can take almost any weapon and customize it on the fly, not unlike the Crysis series. So if you pick up an M4A1, you can exchange the optics, barrel attachments, possibly even ammunition or magazine types, and things of that nature whenever you want. This means that you can essentially switch from having an accurized carbine to a light support weapon as the situation demands it.
How this plays into the multiplayer is unclear, though a beta is expected to be released in the Winter with the full game coming out in 2016.