You have to do it when it counts, in the playoffs.
True, the 2015 Warriors weren't real until June 16th, 2015, when they finally won the championship
2012 Heat, 2011 Mavs, and 2004 Pistons also weren't real either until June. Anything during those regular seasons were just fake shyt by unprovens and/or choke artists
The logic is sound, I suppose. Altho in that case any new champion can only be acknowledged as "real" retroactively
And if they never win (Thunder 2011-2016) then in a way they were never real to begin with.
It's a cold narrative-driven sports world we live in but those are the breaks.