Kantor on 10 January 2013
Okay, if you've got a moment, here's a highly entertaining fan theory: http://asoiaf.westeros.org/index.php/topic/68433-my-new-big-theory-about-dorne-aegon-stuff/
If not, I'll try to concisely summarise.
So the OP has two problems.
1) Dorne has done nothing but waste time for the last five novels.
2) Varys spoke to Kevan and specifically said that Aegon had returned to Westeros.
He concludes:
Gerold "Darkstar" Dayne is Aegon Targaryen
- This shows why Doran is afraid of him
- Like all Daynes, he has Targ features
- This makes House Dayne the perfect place to hide him. No need for hair dye or any of that rubbish.
- Was Doran the great plotter really counting on the survival of Viserys, a beggar king with no army and no supporters except one guy in Pentos?
- Varys told Kevan the truth. Aegon IS in Westeros.
- Doran sent Quentyn to die and build some sympathy with Dany (who has dragons)
- Darkstar captured Storm's End (this seems very iffy since Arianne is definitely going to meet Connington)
- Only Varys and Doran know. Illyrio and Connington are ignorant.
- Young Griff is a Blackfyre on his mother's side, and Illyrio is his father.
It's not terribly likely, but it's fun.
(Former) Lead Moderator and (Eternal) VGC Detective 
