[Uatu]

So, a worldhack (heh) for Forgotten Realms 1e then? What kind of stuff would we be making here?

I guess I can see:

1. Icons/Pics/Sprites of the Forgotten Realms-themed races (moon elves, sun elves, gold dwarves, jungle dwarves, arctic dwarves, etc.)
2. Icons/Pics/Sprites of Forgotten Realms-themed PCs/NPCs (priesthoods (Sune, Helm, etc.), specific characters (Elminster, Drizzt, etc.))
3. Icons/Pics/Sprites of Forgotten Realms-themed creatures/monsters (avariel, lythari, tressym, divine avatars, etc.)
4. Spell effects for Forgotten Realms-based spells (Snilloc's Snowball, Frost Fingers, etc.).

That sort of thing?

Forgotten Realms does seem to me to be a mostly 2e system (since the campaign setting really thrived during the 2e period), though - a lot of materials happened after 2e (i.e. the specialty priests, a lot of campaign material, etc.).

The Serosian aquatic elves I did (icons) also are from 2e.