Keep in mind none of this is officially confirmed yet.
- First adventure zone is Craglorn - (map of Craglorn: http://www.esohead.com/zones/603-craglorn)
- They are large zones (2/3 the size of the main zones) tuned exclusively for group content (4-12 man).
- Each adventure zone will have a combination of questing, multiple dungeons, multiple caves, etc (just like normal zones) but all tuned for groups. Some content will be small group and a large amount will be raid (12 players). No solo content in these.
- These zones MAY (apparently not confirmed, big rumor) introduce character progression beyond veteran level 10 rank.
- There MAY be a second adventure zone (Trials) at launch. There is uncertainty with this however that Trials may be part of the name of Craglorn "Trials of Craglorn" and there is actually just the 1 adventure zone.
Copy pasted it from forum