Only way in my mind the Cavs don't make it into the Finals is if Love's back finally gives out or Kyrie gets cheap-shotted by Noah. Injuries are always in the back of my mind when it comes to both and I'm just crossing my fingers that they can stay in (relatively) one piece.
Only team that scares me in the Finals are yes, the Spurs. Duncan, Leonard, Parker, Pop all are battle-tested and in Duncan and Pop's case, they'd like nothing more than to go out w/ another title and retire after the season. They'll give the Cavs everything they have and I would expect nothing less.
But the thing I keep coming back to over and over again is LeBron. Dude couldn't handle the pressure, didn't have the supporting cast, and didn't have the maturity to get a title here first time around but this time, he's got all three. And whatever anybody thinks of Blatt (and I think the guy is severly underrated now and will only get better next year), he's heads and shoulders above Mike Brown in Xs and Os and leadership.
LeBron is all about his Legacy as a player and though he may never catch MJ in rings, bringing a Title to the most tortured fanbase in sports is in itself something that will stand apart from anything Jordan, Duncan, Kobe, Magic, Bird etc has done. We all know what would happen if the Cavs win a title this year. It would be the sports story of the decade, if not a generation. I get literal chills everytime I think about the Cavs closing out the Finals and LeBron holding the trophy as Cleveland goes absolutely insane. It's almost too much to think about.
But if I had to bet on it happening this year, I think it happens. LeBron knows he won't have to do it by himself; he's got the horses this time around. He knows what it would mean to this city and I know he's pounded it into the heads of Love, JR, Shump, Mozgod and Kyrie; he knows. More than anything else, he wants to be the guy who finally ends the heartbreak. It would make everything that happened in his first go around immaterial. It would be nuclear.
The only thing I worry about is injuries. You have no control over that; you just never know.