Seeing this be a year out, I'm thinking we see another round of BC titles tied to ABK acquisition.
Here's the reported list of 220 games being delisted from 360 market place. This doesn't count games with physical copies.
https://www.videogameschronicle.com/news/analysis-more-than-220-digital-games-will-disappear-when-the-xbox-360-store-closes/
I didn't overly check these. Several listed have other newer XB releases such as RE, RE0, Xevious.
... I really need to buy Rez HD. That's a standout to me.