With enough money, anything is possible, but Kadokawa would sell FromSoft for, likely, such an insanely high figure, that I doubt Sony would see it as a worthwhile investment. Sure for us fans, FromSoft is a priceless investment, and we would pay whatever figure Kadokawa proposed, if they were even open to selling. But Sony has bills to pay, not all of them related to Playstation.
At that point, if you are willing to throw THAT amount of money around (we are talking about Sony here, they wouldnt), just spring for Capcom.