The B-26, C.202, C.205 and C-47 are all Aces High v1.00 models, so they are the oldest in the game.
Others that need updating are, in alphabetic order,:
A-20G
A6M2
A6M5b
Ar234B
B6N2
Bf110C-4b
Bf110G-2
Boston Mk III
D3A1
F4F-4
FM2
Hurricane Mk I
Hurricane Mk IIc
Hurricane Mk IId
Ju87D-3
Ju88A-4
Ki-61-I-KAIc
Ki-67
Lancaster Mk III
LVT(A)2
LVT(A)4
M-3
M-8
M-16
Me163B
Mosquito Mk VI
P-40B
P-40E
Panzer IV H
SBD-5
TBM-3
Tempest Mk V
Tiger I
Yak-9T
Yak-9U
I also think the Ki-84 could really use a touch up on its cockpit, particularly the framing.