This topic is more complicated, as Assets/Content need time and resources, so I can understand if these will not be considered, but no harm in placing them here anyhow, especially as their additions could see Reforger then being "Content complete".

Kepp in mind that also I am not saying we should get all these in the same package, but at least some over some updates, or even a new post release Roadmap, in the lead up to finally wrapping up Reforger development and going all-in on Arma 4.

FIA:

Weapons:
Kozlice Shotgun
M1911
CZ 550
Sa 25 Submachine Gun
Uzi Submachine Gun

Vehicles:
T-55
Mi-8

Apparel:
Balaclavas:

Face Covers:

Miscellaneous:
Some randomization in headgear and clothes, to make them a bit more ragtag

Soviets:

Weapons:
AKS-74 + N Variant
9K38 Igla

Vehicles:
Mi-24 Hind
T-72
BMP-2
BM-21 Grad
Mikoyan MiG-29
Antonov An-22

US/NATO:

Weapons:
MLRS Launcher
FIM-92 Stinger
MP5 and MP5-SD Submachine Gun

Vehicles
AH-64 Apache
M1 Abrams
Bradley Fighting Vehicle
AAV-7A1 Amphibious Vehicle
F-15 Eagle
C-130 Hercules

Civilian:

Vehicles:
Civilian versions of the Mi-8, used for Search and Rescue/Fire Fighting

Apparel:
Longcoat (maybe even longcoats for Officers of the Soviets and NATO)
Tank-Top, with striped variants for different branches of the Soviet military

Miscellaneous:
More civilian gear in the form of uniforms for Police, and a police car, and for fire fighters.
General:

1. New heads for both NATO and Soviet forces, that have camo on them, could be useful for special forces units
2. Some form of boat/boats, considering we are on Islands
3. A version of the S105 car, with darkened glass and higher armor, intended as a VIP Vehicle

Large Content:
So this sections contents would definitely require resources and time to make, so I would not be surprised if little or none of this is added

1. Kolgujev, a dreary island filled with swamps, dead forests and abandoned and ruined villages.

Alongside introducing officially the "Wastelands" game mode (name placeholder) popularized in Arma 3, with 2 teams fighting over resources and equipment randomly generated across the map to destroy each other and hostile FIA forces

2. Nogova, a large and varied island, with a flatlands to the south and mountains to the north, with the capital city of Lipany situated at the south, and is a proper city, with any army planning to fight in it expecting Urban Warfare at its worst, with High rise Soviet Bloc apartments and large buildings near the center, surrounded by a quagmire of suburbs, it is a city and island dealing with the consequences of Guba's actions, and is being rebuilt with help of the West

Alongside introducing "Assault" game mode (name placeholder) where one side fights to conquer strategic areas across the map held by the AI opposing faction (both can be set in settings) and were each area taken has a QRF response to try and push them back, getting more intense as the fighting get closer to the AI HQ, once conquered, players win