Hi, the Comintern fighter skin is related to these models:
https://en.wikipedia.org/wiki/Polikarpov_I-15
https://en.wikipedia.org/wiki/Polikarpov_I-153
These bi-planes were developed shortly before WW2 and were actually used in WW2. They were one of the major fighter types of the Soviets in the early war.
To quote Wikipedia here, for some history:
"In 1937, the Polikarpov design bureau carried out studies to improve on the performance of its I-15 and I-15bis biplane fighters without sacrificing manoeuvrability, as Soviet tactical doctrine was based on a mix of high performance monoplane fighters (met by the Polikarpov I-16) and agile biplanes. Early combat experience from the Spanish Civil War had shown that the I-16 had problems dealing with the Fiat CR.32 biplanes used by the Italian forces supporting the Nationalists, which suggested a need to continue the use of biplane fighters, and as a result, Polikarpov's proposals were accepted, and his design bureau was instructed to design a new biplane fighter."
So yeah since we had the opportunity we featured these agile biplanes for the early Interceptor levels to create a nice contrast to the model that we plan for the later Interceptor levels, which then feature a monoplane. So you actually get some nice progression when you level up your planes. No ETA yet when these lategame skins will come though.