Here are some tidbits of what is in store:

The episode will mostly take place in AGN's true physical headquarters... an abandoned Ohio roundhouse.

In the basement of this roundhouse is the Zelda Classic Research and Development Centre, where Dark Nation and bigjoe work as mad scientists, engineering a legion of abominable Custom Enemies who will serve as the backbone of a future AGN Army.

We will see at least one "custom enemy." Also...

There will be an epic confrontation between Breaker and Glenn the Great.

Expect the Lilith storyline to be followed up on. Moocow will use her dildo. Lightningz and Zeldafan probably make cameos. Darth Marsden might.... well, that's too secret for now.