My assumption is that Fortnitemares is essentially Battle Royale for the spooky season. The aim is still to land, fight and win and when you win, you emote. Lora did say you may be able to emote, not will.
Done well, that could create a developing or “evolving” game taking place all around you.
Land, fight, storm, victory, emote.
Sounds like a good time to me.