Source:
https://aw.my.games/en/news/general/development-exile-battle-path
In summary:
This is essentially a continuation of Eclipse battle path, but with 50 ranks max, 3 new vehicles within the ranks (wheeled Boxer CRV, Puma, and tracked Boxer RIWP), and no overprogression ranks.
4 months long and 5,000 coins per rank.
No new crate vehicle, but there is a mention of KF51 blueprints. The vehicle itself has not been announced yet (probably a lootcrate vehicle in the future).
ETA November, i.e. right after Eclipse battle path assuming no delays.