During his media day press conference, LeBron said he was ready to hand over the keys—Kyrie just had to take them (starting at 1:06):
“I tried to do whatever I could do to help the kid out, be the best player that he could be.
“I tried to help him be a better leader, a better scorer, a better floor general, a better defender, a better passer getting guys involved, a better vocally.
“I tried to give him everything, and give him as much of the DNA as I could because like I told you guys throughout the season, at some point, when he was ready to take over the keys, I was ready to give them to him.”
And for those interested in watching LeBron’s full press conference, here you go: