I don't know 4Ed too well from the DMing side, but I'm not going to let that stop me!
1) it's a nature-centric campaign, so an adventure about "cleansing" a corrupted sacred grove is *ahem* a natural. There was a short story YEARS ago in Dragon in which some Druids sent an agent to cleanse a corrupted evil swamp and turn it back into its more natural form.
2) steal some Primeval plotlines- dinosaurs loose in the city after popping through mysterious glowing balls of light. Except as I recall, in Eberron, they don't have to be time or dimension portals, just teleporters.
1) it's a nature-centric campaign, so an adventure about "cleansing" a corrupted sacred grove is *ahem* a natural. There was a short story YEARS ago in Dragon in which some Druids sent an agent to cleanse a corrupted evil swamp and turn it back into its more natural form.
2) steal some Primeval plotlines- dinosaurs loose in the city after popping through mysterious glowing balls of light. Except as I recall, in Eberron, they don't have to be time or dimension portals, just teleporters.