SPOILERS AHEAD FOR THE MANDALORIAN SEASON 2 FINALE!!!
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Ok, if you have made it this far, you have legally chosen to see read the awesomeness that was revealed in the stinger at the end of The Mandalorian season 2!
During the Disney investors call, Bob Iger revealed that there were 10 ‘new and original’ Disney+ Star Wars series being developed, but during the presentation by Kathleen Kennedy, only 9 were shown. Many people thought that Iger’s comment could have been in reference to The Mandalorian season 3, but alas, Lucasfilm duped us as the stinger scene for S2 E8 of The Mandalorian revealed the 10th series.

After the amazing ending to the season, we see a scene of Fennec Shand and Boba Fett marching into Jabba’s palace on Tatooine and killing everyone, including Bib Fortuna who was seated on Jabba’s throne. After dispatching their marks, Boba sits on the throne with Fennec at his right hand drinking some spotchka. The scene fades out and we see the image above.

The Book of Boba Fett falls perfectly in line with the speculation we put forth on the Star Wars Time Show for a show that would feature both older and younger Boba Fett as the older Boba records his life stories. This would also line up with rumors that Jordan Bolger was set to play the younger Boba in a ‘prequel style’ series. If we are correct, The Book of Boba Fett would feature both Temuera Morrison and Jordan Bolger in the role of Boba Fett.
Obviously there is no information about this series yet outside of this sly announcement, but give how it was revealed, the route outlined above would make the most sense.