Can Microsoft make Prince of Persia Warrior Within and Two Thrones backwards compatible...

Prince of Persia Two thrones and Sand of time.

The backwards compatibility program ended last year, so if they're not compatible by now, they won't be.

They cannot do anything with any game without the permission of the copyright holder and publisher

The backwards compatibility program has ended and no more titles will be added

Ubisoft is currently remaking Sands of Time, so logically would be looking at the others

Well no as Ubisoft has the code and ms would still need permission from the publisher

Also, the Prince of Persia sequels. Prince of Persia: The Sands of Time is available for Xbox One, but why not Warrior Within and The Two Thrones?

And yet another game would be The Chronicles of Riddick: Escape from Butcher Bay. It was on Xplay's Top Ten Best Xbox Games.

In regards to the two Prince of Persia games, backwards compatibility on the Xbox One is quite complex. They don't just make a small patch to make the games work. Each individual game has to converted to run on the Xbox One hardware. This is very time consuming.

When you insert a BC disc into the console for the first, the machine will tell you there is a update available. But this isn't an update, it's the game, recoded to run on Xbox One. Unless there are licensing issues, it's likely the BC team just never got
around to it.

Chronicles of Riddick will never be BC. It is based on the movie licence. When developers/publishers make games based on movie or TV licenses, these licenses are only held for a finite period of time. This license expired well over a decade
ago.