"new British SPG branch."
They tease "iconic and well-known" artillery is on the way with Sexton, Bishop and the Crusader as mid-tier entries. There'll be some "post-war prototypes" in the higher tier.
A new map is also coming with update 8.7: Belogorsk-19 is a "chilling and unforgiving Russian winter landscape," and is accompanied by a tier change for the Soviets.
"The core of Version 8.7 is the new British SPG branch,” said Mike Zhivets. “The upcoming expansion features several stand out models that are likely to catch on with the masses and spice up the overall artillery gameplay.”
The Tier 5 Soviet light tank T-50-2 is being swapped out for the MT-25, "a visually unique light tank known for his high rate of acceleration and surprisingly powerful gun." For more about the proposed changes in update 8.7 check out the , which includes a changelog.