The teaser trailer doesn't show much:
https://www.youtube.com/watch?v=LGmkvvrtxzI&feature=youtu.be
But we will get more details, as well as gameplay footage, during this year's E3 (June 10th to 12th).
Many prominent gaming outlets have already been shown a gameplay demo. Among some of the first impressions articles, Rock Paper Shotgun's caught my eye:
http://www.rockpapershotgun.com/2014/06/03/first-look-homefront-the-revolution/
According to them, Homefront: The Revolution is very much reminiscent of the first Crysis. Interesting!
Known details of the game include: Open world first person shooter, completely unscripted combat, crafting system for weapons and IEDs, Crysis-style weapon customization, 4-player co-op set in the same full, open world as the single player campaign...
What do you guys think?