Source: VK Wotleaks community
apparently, according to the source listed above, the testing of new “Garage Battles” mode has begun on supertest. It’s a 15 vs 15 battle (of an unspecified tier, but I am assuming it’s tier 10 mode) where you have three lives.
Basically, you can respawn twice. After your death, you can choose where you respawn from several options. Hulls of the destroyed tanks do not remain on the map, they disappear.