Denver and Toronto are my two favourite teams thus far. For a similar reason, I just love what they have put together defensively and I believe they have created a great foundation to add more talent to. To allow other star players to fill a role more easily than some other teams are able to.
Keeping an eye on Dallas and Utah. They are both strong as well but their teams haven't taken shape as much as Denver and Toronto already have. Still creating their respective identities.
Not high on Dallas. Don't think the Lebron and Luka combo works well. Luka would look a lot better on OKC for example.
Not high on Dallas either and I'm the one making the picks. 
I'm just super high on Luka. I truly believe that he's a GOAT candidate in the making. I couldn't pass on him at #33.
Luka and Bron are available for trade. I'd rather build around Bron, but I'm open to the idea of building around Luka. That's how much faith I have in this kid.
Part of me sees that too ..
... but then this other part of me starts to think "Gee, how the heck do I matchup against that?"
LeBron and Luka are two big strong physical forward with guard skills. Then you have Ray Allen as a two guard with solid size. That is a huge perimeter trio to matchup defensively against.
And if you go small with Luka at SF and LeBron at PF, every slow footed PF in this Historical League will be shaking in their boots at the idea of having to cover Luka or LeBron. Actually that small lineup is even scarier than the big lineup.
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It may not flow together beautifully at all times but dang it if it is not effective.
(1) The matchup problems that they can create is massive
(2) Every time the ball swings from strong side of the floor to weak side of the floor you got Luka or LeBron attacking a defense off the dribble that is scrambling to get back into position. That will be lethal too.