Revolutionary heroes ranging from John Brown to Kim Il-Sung are isekai'd to a fantasy world that parodies shows like 'the rising of the shield hero' to break the chains of slavery in all forms once more and liberate the fantasy workers and the peasants from the yoke of feudal oppression while hunting down so-called "heroes" summoned by the feudal lords who intend to use them as tools to preserve their power and the economic base of their feudalistic slave economy.
Show me Stalin riding a chocobo or some shit leading a calvary charge against slaver caravans!
Show me Marx, Engels, and Lenin working together in the cities inspiring the proto-proletariate to take up arms against the feudal robber-barons and their land-leechs that bleed them dry
Show me Mao, Tito, and bonus character Jan Žižka, on a rural bro-venture with the three in a competitive rivalry to see who can organize the greatest peasant rebellion between the three!
For animation, you can use Blender or OpenToonz. Toonz is the same software that was used by Studio Ghibli, Futurama, and Spongebob.
Yeah, I have both Blender and OpenToonz installed on my own computer, and I can certainly attest that if you have the patience to learn them and are trying to make a serious animation of serious quality, then that's what you would use. I was really just making a joke about "fanime" shows like SPARKLE ON RAVEN, My Jungle Book, Your Year!, Nyan~ Neko Sugar Girls, and Tokyo Crystal Mew — which have conventionally been made in MS Paint and Windows Movie Maker, or similar programs.