Let's Read The Immortal Handbook Bestiary

[ColorBlindNinja]

This exercise begs the question; What DO we want in an epic monster?

Kaiju are supposed to be punching bags so far as their lore is concerned.
Do we want every epic challenge to be wizard Godzilla?

Is Galactus a threat purely due to his size?

Perhaps late season Stargate style Replicators on occasion.

What exactly constitutes an epic threat, let alone an epic monster?

These are all good questions. A big part of the problem with answering them is that epic play is so abysmally designed, that it's in desperate need of a major redesign.