While keeping a positive attitude, it is almost important to be realistic. Remember Vegas is built on the reality that there are more optimists than Mathematicians gambling there.
For the Spurs to make it to the finals, the big 3 needs to be Tim, Tony and Kawhi. Tiago and Green can't disappear like they did last year, they have to step their games up.
The 2nd unit (the two or three that get to play) can't come in with deer in headlight look and freak out, SJax needs to be consistent, Nando needs to play defense, Diaw needs to score some freaking points, and Neal, well Neal needs to be Neal of two years ago and then anything we get from Manu will be icing on the cake.
There are certain facts that can't be overlooked, Manu isn't the Manu of 5 years ago, he's more brittle, he's not to be counted on, heck when he comes back this time,how many really believe that he'll last for more than a few games? It's undeniable that there has been a steady decline in his skill set, because of how he plays the game, and if Pop thinks for a moment that Manu can suddenly regain his touch, then it's going to be another disappointing playoff run for the team.
Since you can't fix stupid, at least you should be able to prosecute it!