The Tier VIII British Gonsalo heavy tank entered Supertest stage. No information was shared about this vehicle plan, but it does have a Premium status in Supertest. This is a complete copy of the Caliban, with very similar characteristics, but features a standard 120mm gun, instead of the 152.4mm autoreloading present on the Caliban.
Last, but not least, yes, the vehicle is a complete fake and there was no plans to fit a 120mm gun in the vehicle.
All characteristics are with a crew trained to 100% and subject to change before the final release.