Here's a bunch of random related stuff I found looking around the net!
New game+ and skills info:
"Hey guys, just to clarify you will NOT have to start all over with your skill points/upgrades after you clear the game. You'll be prompted with a new game+ option where you'll start a new game with all the skill/upgrade loadouts you previoulsy had. This also works between characters so for example if you beat Leon's campaign, those upgrades will transfer to Chris when you start his storyline.
Also, semi-related, you won't be able to unlock all of the skills in a single game clear. In fact on the first clear you'll only be able to upgrade just a couple times depending on if you choose some of the more expensive options or not. Either way, you'll have to play quite some time and/or be a master skill point hunter to unlock them all, best of luck and happy hunting!
PS: infinite ammo is now a per-weapon based skill that you can unlock, but they are pretty costly so you'll have to either sacrifice some upgrades along the way or grind those points out the old fashioned way

"
Source:
http://www.capcom-unity.com/ask_cap...973/re6-upgrade-question&post_num=4#524323717
There's also a guy claiming the mini-gun and rocket launcher will return.
New footage of Leon's chapter 2 from TGS:
http://www.youtube.com/watch?v=TTBo8CYQg-Q
New footage of Agent Hunt multiplayer mode also from TGS:
http://www.youtube.com/watch?v=VFCuh_tydY8&feature=plcp