So, my assumption was that a new form of Jedi would use "Skywalker" as their title. What new Jedi? Perhaps those inspired by the legend of Luke Skywalker from 30+ years prior who took his name and adopted it in tribute.
And the last bit of dialogue from Luke in TLJ was about how he wasn't the last Jedi (then a pan to Rey). Fast forward more than a year later, and the first bit of footage from the sequel is Luke's voice reinforcing the same message. I saw nothing but synergy there. From the theme of new generations taking inspiration and forging on in new ways (with inspiration, rather than lineage, being enough impetus), to Luke specifically reciting a line from one film to the next.