Here's my prediction:
1. We come in.
2. Do a bunch of fetch quest.
3. Gain ishgard trust.
4. Dragons attack.
5. More fetch quests.
6. Some plot twist.
7. Everything's cleared up, dragons are the good guys actually but we have to kill the real evil dragon by doing a series of fetch quests and a not so hard trial but everyone can't beat it so people will whine in the forums.
8. Kill some primals because why not.
9. We rescue the scions who are alive actually oh and save the other guy
10. More fetch quests
11. Everyone is happy and hopeful
12.Some previews for the next expansion which will probably involve uldah.
13. Some more previews of ascians giggling in the background sayings it's all part of their plan.