https://www.gamespot.com/articles/xbox-one-adding-new-original-xbox-backwards-compat/1100-6458121/

Update: It turns out Microsoft has more extensive plans the four games mentioned below. 19 more original Xbox games will be added to Xbox One backwards compatibility this month, split across two batches. In addition to those that were discovered in advance, we're also getting Jade Empire and Star Wars: Knights of the Old Republic II, among others. The original story follows.

After Xbox One backwards compatibility support for original Xbox games was announced, Microsoft made it clear that we would not see new titles added regularly. To date, only one batch of games has been released, but another has now arrived--and it includes some quality additions.