A new Super Heavy could be coming to the Heresy!
And it is all revealed on page 289 of Conquest, where we see the rules for the new Stormhammer!
According to the 40k Wiki:
The Stormhammer is a super-heavy tank of the Imperial Guard and is the rarest variant of the Baneblade super-heavy tank. The Stormhammer is one of the most powerful tanks ever deployed by the Imperium in terms of its pure firepower on the battlefield, and it is believed to be the most heavily armed tank currently used by the Imperium of Man‘s armed forces during the 41st Millennium. As a result, the Stormhammer is the rarest of the Baneblade tank variants in use by the Imperial Guard, or any other Imperial faction.
Thanks to Forge the Narrative and Spikey Bits for this info.
Loken