Will Xbox and Microsoft announce more games to be backwards compatible, or are they done...

Microsoft announced they are no longer working on adding more games to the backwards compatibility library.

You can read about the announcement here: https://www.polygon.com/e3/2019/6/1...kwards-compatibility-project-scarlett-e3-2019

Also, here's a complete list of all backwards compatible games: https://www.xbox.com/en-US/xbox-one/backward-compatibility/available-games

It's on hiatus at the very least.

They've stopped the backwards compatibility program for the time being, their main focus now is getting backwards compatibility running smoothly on Scarlett so it's a smooth transition.

I'd imagine they'll start adding more games to the list once it's up and running on Scarlett, fingers crossed for that anyway.

There really isn't much more to add, in my opinion, so I will just provide an official source to that info.

https://news.xbox.com/en-us/2019/06/10/e3-2019-whats-next-xbox-backward-compatibility/

I hope there will be a more variety of better games than they have released.

They've stopped the backwards compatibility program for the time being, their main focus now is getting backwards compatibility running smoothly on Scarlett so it's a smooth transition.

I'd imagine they'll start adding more games to the list once it's up and running on Scarlett, fingers crossed for that anyway.