I guess I am one of the realistic few. Sorry, but I don't see any team in this league capable of winning 72 games. This is not MJ's NBA. More than a decade later this league is much deeper in talented players who could go off and control one whole game(heck Ramon Sessions scored 44 points in one game last year) and talented elite teams that will knock each other off.
I think the overall talent level of the league has created that old axiom that on any given night, any team in this league can be beaten by any other. For that reason I see at least 5 OOOOPS games in every good teams season this year. 5 games they just had no business losing. Add to that the rigors of having to play Orlando and Cleveland 4 times each and the Lakers, Spurs, Jazz, Rockets, Hornets, Nuggets and Trailblazers twice each and I just don't see this team overcoming that.
Not only that but they have two brutal stretches of games in the schedule(red highlighted games being tough games):
Sun, Nov 29 @ Miami
Tue, Dec 1 @ Charlotte
Thu, Dec 3 @ San Antonio
Fri, Dec 4 @ Oklahoma City
Tue, Dec 8 Milwaukee
Thu, Dec 10 @ Washington
Sat, Dec 12 @ Chicago
Mon, Dec 14 @ Memphis
Fri, Dec 18 Philadelphia
Sun, Dec 20 Minnesota
Tue, Dec 22 Indiana
Fri, Dec 25 @ Orlando
Sun, Dec 27 @ LA Clippers
Mon, Dec 28 @ Golden State
Wed, Dec 30 @ Phoenix
Sat, Jan 2 Toronto
Wed, Jan 6 @ Miami
Fri, Jan 8 @ Atlanta
Sun, Jan 10 @ Toronto
Mon, Jan 11 Atlanta
20 games in 44 days. 14 road games, 6 at home. I could easily see 6-7 losses in this stretch, a stretch that over the last two years they have stumbled through.
Thu, Jan 28 @ Orlando
Fri, Jan 29 @ Atlanta
Sun, Jan 31 LA Lakers
Mon, Feb 1 @ Washington
Wed, Feb 3 Miami
Fri, Feb 5 New Jersey
Sun, Feb 7 Orlando
Wed, Feb 10 @ New Orleans
Tue, Feb 16 @ Sacramento
Thu, Feb 18 @ LA Lakers
Fri, Feb 19 @ Portland
Sun, Feb 21 @ Denver
12 games in 25 days. 7 one the road, 5 at home. 8 really tough, tough games. 4-5 losses in this stretch is also very possible.
Could they cruise through the remainder of the schedule? Sure. But they might have to go undefeated in the remainder of all there games just to have a shot at 72 wins in my estimation.
Being a homer is good but until I see LeBron, Howard and Wade all on the same team, I don't see a team capable of winning 72 games in one year anytime soon.