Operation Flashpoint 2: Dragon Rising is the official successor to Operation Flashpoint, developed by Codemasters instead of Bohemia Interactive Studio. The game will revolve around a fictional conflict between the United States and China on the island of Skira (in the Aleutian island chain).
Weapons list (as currently known of from previews at E3 2008):
U.S. Army
M9
Original Colt M1911 (dated 1913) - .45 ACP
Heckler & Koch MP5A2
Heckler & Koch MP5A2 9mm with "tropical" Wide forearm
Heckler & Koch MP5A3
Heckler & Koch MP5A3 9mm with slim handguard
Heckler & Koch MP5SD6
FN SCAR-L (Mk. 16)
A First Gen FN SCAR-L 5.56x45mm with M68 Aimpoint scope and Grippod foregrip.
FN SCAR-H (Mk. 17)
M4A1 carbine
Colt M4A1 Carbine with M68 Aimpoint reflex optic and Knight's Armament RAS railed handguard and vertical forward grip - 5.56x45mm
M16A4
M16A4 MWS (Modular Weapon System) with RAS rails installed, AN/PEQ-2 IR designator, RIS foregrip, and (replica) ACOG scope 5.56x45mm. This is the USMC style set up.
M110 sass
Barrett M107
Springfield M21
Remington M24
Mk. 48 Mod 0
M240
M2HB
XM312
M1014 JSCS
M32 MGL
SMAW
AGM-148 Javelin
AT4
FIM-92 Stinger
M203 Grenade Launcher
People's Liberation Army
QSZ-92
Type 05
QBZ-95
Type 81
QBB-95
QBJ-88
QJZ89
Unknown Chinese pump action shotgun
QLB-06
Type 69 RPG
PF-89
HN-5