As this market mature, the more we have huge adoption of cryptocurrency across different fields just the way we had DeFi in just recent trend, I think by next year we will have something similar and better.
You don't expect it, it comes as a wind by power of decentralization and Fomo ( plus little manipulation).
Without fomo, there wouldn't be a season just like the way we are recently experiencing bitcoin pump, there is no fear, everyone is ready to buy even at $20k. That's how Fomo began at every season.
So in summary to your question, altcoins season will emerge when we have enough pump to bitcoin.