Source: WoT EU portal
Few top-tier vehicles among the Soviet lineup feel all that different to play in the big picture. Update 9.22 will fix that with a heavy-armored close-range fighter, which can bring more versatility to a rather traditional tank design school.
The Object 705A that entered Supertest last December is set to crown the upcoming alternative line of Soviet heavy tanks, starting with the IS-M at Tier VIII and reaching the Object 705 at Tier IX. The most authentic point about the trio is their rear-mounted turrets, which define their core playstyle.
The all-time classic, IS, will become the foundation for the upcoming branch, so you can start hoarding the needed experience to explore the three newcomers.