I think teams are going to trade up to get the #1 pick. Whoever has the most 1st and 2nd round picks this year....I expect them to consolidate.
I doubt any team would trade that #1, though, no matter the player. It would have to be a young superstar like Durant, and at that point, would the Thunder make that deal? I don't think so.
Put 29 teams in that position (for whatever reason), and assume Miami offers LeBron. Problem with that is, LeBron will either be a free agent (so it would have to be a S&T), or he'll be on the last year of his contract after taking his Player Option, which means he'll eventually be unrestricted...and a possible one-year rental for that team with the top pick.
I think all 30 teams would trade an all-star for him...no doubt in my mind. A superstar? Depends on the contract he's holding...and at that point, those bottom-feeding teams have to understand that they are in a small market (likely), looking at history (him leaving Cleveland for Miami, Howard departing two different teams, Melo and CP3 having their way, etc), and taking into consideration the fact that Wiggins is the closest thing to a sure deal since LeBron James.