Yeah, there is a chance for the current 21 since these are G2 toys.
T-Rex basically did all the computer designs works for Yamato's Generation 3 toy line, so it's very unlikely for Arcadia to revisit G3 line except reissue.
G1
1/72 Mac+
1/60 VF-1 (widely known as V1)
G2
1/48 VF-1
1/60 YF-21/22, YF-19, except VF-11
1/60 Zero
G3
1/60 VF-11
1/60 VF-1 (widely known as V2)
1/60 M7
There was a history page of all Yamato's toy lines and generations categorized by the craftsmanships of their products.
The G1 were crappy toys with poor fitments and unnecessary die-casts, but it's the opening page to the world after 15 years of Takatoku and Bandai. They switched factories apparently to start the G2 by eliminating most die-casts on the surface, but the fitments and materials were problematic. The G3 is the current toy line since 2006, IIRC, where collectors really enjoy their improved built and fitments from the helps of T-Rex, and possibly new factories.