Thanks to some people willing to break the NDA (non-disclosure agreement) they agreed on to be part of the Star Wars Battlefront II alpha test (currently only available to PC players only), we now have a ton of Star Wars Battlefront II info out in the wild.
Before reading further, just remember that all the info below comes from an alpha build of the game, and as such, there is a chance that some things might get changed, added, deducted and so on.
Weapons:
Cr2

DC-15A

E5

E11

EE3

MPL_Scattergrenades

Orbital_Strike

RocketLauncher

T7iondistruptor

DC-15

E5c

FWMB10

E5s

Valken38x

Blurrg1120

DC17

Dl44

PingLauncher

RG4D

ScoutPistol

Hunter(ScatterShot)

A280cfe

Z6 RotaryBlaster

DLT20a

DeathRay

Scandart

DLT19

A280

BowCaster
Vehicles:
Space:
Cr2

DC-15A

E5

E11

EE3

MPL_Scattergrenades

Orbital_Strike
RocketLauncher

T7iondistruptor

DC-15

E5c

FWMB10

E5s

Valken38x

Blurrg1120

DC17

Dl44

PingLauncher

RG4D

ScoutPistol

Hunter(ScatterShot)

A280cfe

Z6 RotaryBlaster

DLT20a

DeathRay

Scandart

DLT19

A280

BowCaster
Ground:
AAT

ATRT

MTT

AT-AT

ATST

Coruscantspeeder
Characters:
Stormtrooper

Rebel Snowtrooper

CloneTrooper

Clone Officer

Clone Specialist

Clone Heavy

B1 Droid

Battledroid Officer (OM-Series)

Battledroid Specialist

Battledroid Heavy
Special Characters:
B2 battledroid

Clone JumpTrooper

Clone Commando

Resistance Jumptrooper
Heroes:
Darth Maul

Rey

Boba Fett

Jango Fett

Han Solo
Living World Creatures:
Jawa

Twirl

Pelikki
...