what if that Ultron made his way to marvel Earth, and they managed to get the soul gem away from him, so that was Ulton/Vision merged with 5 gems left vrs Thor in Destroyer?
in the comics that is.
As for the What If? series, anything goes so I’ll just have Ulron/Vision phase into the Destroyer armor and overcoming it whereby becoming Ultron the Destroyer! Reclaiming the soul gem and now possessing all six gems, the now renamed Infinity Destroyer gets possessed by the mysterious sentience of the gems as if kicks out both Thor and Ultron/Vision and absorbs them inside the soul gem since it now has a new indestructible “body” to wield its powers. The Infinity Destroyer will now be the new upcoming big bad villain of the MCU.