That altcoin season depends on bitcoin's performance. There can be another altcoin season when bitcoin goes into the likely bull run of 2017 but there could also be none.
Investors these days mostly focusing on bitcoin base to the attention that it has brought worldwide which includes the fin-tech companies that are really have shown interest to get into bitcoin.
I think the "MAX PAIN" is gonna hit bitcoin harder than alts, as miners will start to quit because mining won't be as profitable as it was because of the halving.
They will turn off their miners for a while but they'll also be back again. Let us wait for a few more months to see if they can't sustain it anymore but I doubt it that they'll do it long term.