Yep, looks like Battlefield 3 alright. I am so curious about what they're going to do with BF4 that couldn't just be a content DLC patch/expansion for BF3, especially this soon after BF3's release.
Those clearly aren't screenshots. They look to be frames from a trailer, in-game pre-rendered movie, or concept art in the case of the last image.
The last one looks like BF3. The entire game looks like BF3, except with more sweat on everyone's faces. But I will say the game looks good. And another note to the OP, those aren't "leaked" screenshots, they were officially released by EA/DICE. Leaked means that they were released without permission of the creators. Here's the 17-minute gameplay trailer. Looks really good. I will probably skip on the multiplayer aspect of the game because it'll just be BF3 with new maps.
Yeah made me laugh, theres a single moment in that game that proves they actually had at least one military consultant.