This Imperial Fists Deimos Pattern Vindicator was on display at Warhammer World.
The Vindicator is a dedicated siege tank, deployed by the Legiones Astartes to breach enemy fortifications and destroy the heaviest enemy vehicles. Slow, ponderous, but heavily armoured, these tanks rumble into range before unleashing a devastating salvo of demolisher shells or piercing bursts of energy from a magna laser destroyer. Vindicators are especially useful in the confined terrain of cities or other enclosed battlefields, where they can smash buildings to broken ruins and forge a path through otherwise impassable obstacles.
I have a Typhon Siege Tank for my Imperial Fists army, so not sure if I need another siege tank. Having said that I do like the Deimos Pattern Vindicator model, so you never know.