There are rumors about what miniatures the stormcast will get for the fourth edition box.
The only thing I know is that we will get new models of liberators, who have received their new thunderous armor, part of that in the trailer is shown three possible new miniatures that seem to belong to the newly opened chamber of ruin a character in a Gryph-charger , a unit of three miniatures wielding ax and shield, it also appears that there will be takers from the Chamber of Ruin.
Apart from this, you think that we will get other miniatures, for my part I think that at least we will receive two heroes on foot now, if they will be new models to old models with the new thunderous armor, I don't know.