following two pictures apparently appeared on Wargaming FB before being taken down immediately. They both represent unfinished models, quite strange ones though.
This looks like the twin turret Vickers or 7TP dw. (makes little sense since this version was only armed with machineguns)
This looks like an IS-4 hull with some different turret (looks like T-10)? Quite strange. Storm in any case states he does not know what this is.