The way it ended, it seemed like Chrysalis is on her own in her seeking of revenge. But, here's a thought for everyone: What about the changelings that were replacing everyone? They weren't there for the redemption. They're still out there, ready to serve her. Like those replacing the mane six, those replacing the princesses, and those replacing the crystal empire royal family.

Meaning... Chrysalis is not quite alone in her seeking of revenge.