Not Nike decision I guess, not even FIGC decision, Juve decides. It's only a matter of whether or not we respect FIGC, which should never happen until we get our scudetti back.
IIRC, I read somewhere in the begining of the season that it's not like the championship or Coppa crests.
If the jerseys that will be unveiled in summer are remotely close to looking like the two at the top and the one in the second picture, then we surely are set for a nice jersey next year for a change. In that case, I'll definitely buy one.
Juve said in the past, once we win another scudetto we will put the third star, FIGC can suck our dick since the star thing is not official and after all we started it.