I know this will sound like an extreme hot take and I'll probably draw the ire of some particular posters on this forums for saying this, but here goes:
I think Lebron will purposely lose the Cavaliers this Raptors series.
Why?
Well, for one thing, this Cavaliers team is DEFINITELY NOT beating the Rockets or Warriors in a Finals (unless half the Rockets or Warriors get injured leading up to the Finals). So that would be a 6th Finals loss for Lebron.
On the other hand, if Lebron leads CLE past TOR, but then ends up losing to a Celtics team (w/o Kyrie even playing) or PHI, then it may look real bad for him. If Lebron is seriously considering going to Philly this summer, then while joining them this summer will already paint some doubts about him, having him join PHI AFTER PHI beats him in the ECF would look almost as bad as KD's snake move IMO. Meanwhile, if Kyrie's team somehow beats CLE in the ECF W/O Kyrie even playing, that would look really, really bad too.
In a way, losing this series to TOR is probably his "safest" way of escaping the masses of doubters, as the media and most fans seem to believe Lebron has "zero help" and so that would sound like a legitimate excuse if they lose this series to a deep Toronto team after ALL he did in the Pacers series (w/o Lebron, CLE loses that series in 5 easily).
Some conspiracy theorists even wonder if Lebron thinks it's worth going 200% for a team that's just not built to win it all. He's had stellar games no doubt (Game 7 included), but if Lebron needs to literally score 40+ points a game for CLE to have a chance to win a game, then that's just not a good recipe for success.
Either way, I think Lebron will certainly monitor how the PHI-BOS series goes and see how the Warriors and Rockets do on their end (health wise), but I wouldn't be surprised if TOR wins the series in 6-7 games (though I think ultimately CLE wins in 6 IF Lebron is feeling it).