"We have plenty to keep you busy until Chief arrives: There will be thousands of games to play, spanning four generations, when Xbox Series X launches globally this November and over 100 optimized for Xbox Series X titles, built to take full advantage of our most powerful console, are planned for this year. And with brand new console features like hardware-accelerated Direct X raytracing, framerates up to 120 frames per second, faster loading times, and Quick Resume for multiple games, playing will look and feel better, no matter which games you choose to play on day one.
Which is contradicting your OP which reads:
"According to Microsoft, over 100 games (including improved versions) will be available for launch. I will be editing the thread with the new confirmed titles."
Yet the source says: "over 100 [...] are planned for this year".