I think for this season, Lakers has the highest probability of winning.
You are not the only one who think of that, actually the public thinks Lakers has the biggest chance to win the championship this season.
These are the odds for that :
https://www.oddsshark.com/nba/nba-futures (lakers with +225 to win the NBA finals).
Even though there are super rookies all over other teams, they wouldn't be enough to beat Lebron's team for this season. Golden State is already showing that it wouldn't even have the capability to make it even in the playoffs after having Steph and Thompson injured and Durant moving to Nets. Giannis may become a rival to Lebron and we are all excited to see them brawling in the Finals for the championship, same thing for Russel and Harden in Rockets which can be a scary combo for a team since they are two MVP candidates often.
Not Enough to beat Lebron, maybe... but Lakers now are not only about Lebron James, they have Davis which as good as Lebron and he was a good addiction to the Lakers based on what we are seeing now.