“All I’ll say is, with the young cast, I want to hold on to them as long as possible. So yes, storytelling-wise, we’re not going to do Fargo; we’re not jumping 20 years. But there’s still a lot of nitty gritty for me to work out. So if I told you anything, that would be a lie. At this point, it’s all still pretty flexible,” he said.
While the Season 1 finale hinted that a logical next chapter in the show would be working on the spring musical, Tim noted that nothing is yet set in stone.
While Tim didn’t confirm a release date, it’s been speculated that the show will come out toward the fall in 2020. Of course, since the show was renewed so early on, it has given the cast and crew ample opportunity to begin production for the second season.
Source : https://www.distractify.com/p/high-musical-the-series-season-2