[ArstenWhitebeard]

I don't think there is any chance of Drogo actually coming back, but there may be someone or something that might be symbolic of him that will potentially help her win the throne or defeat the Great Other or something.

Speaking of which, after reading quotes and discussion on various websites about Dany's experience in the house of the undying, I decided to break out the book and re-read the chapter. In doing so I found one thing that is both very striking, and that isn't mentioned on any of the sites I was on.

When Dany is talking to the undying, this quote is somehow always missed by the sites dealing with prophesies.

"drink from the cup of ice... drink from the cup of fire"

This quote leads directly into the "mother of dragons, child of three" stuff I mentioned earlier.

How I missed this before is beyond me, but this seems to be an indication that Dany is the prince(ss) who was promised and hers is the song of ice and fire. Aemon said as much before, and the woods witch prophesied that the prince who was promised would be born of the line of Prince Aerys (aka the Mad King) and Rhaella, which fits Dany,who was their daughter.

The first (that I remember) introduction of the prophecy of tPtwP is from Rhaegar, who thinks Aegon is he, but it is entirely possible,and even likely, that he is wrong. Aemon said that Rhaegar originally thought HE was tPtwP, so he obviously isn't to sure about these things, and if he, like everyone else, thought it was a boy, he wouldn't have considered Dany.

Another thing I found in my re-read, was that the undying refer to her as 3 different entities.

"mother of Dragons, daughter of death"
"Mother of dragons, slayer of lies"
"mother of dragons, bride of fire"

if these are 3 aspects of her, they could be in relation to the 3 heads of the dragon. 3 things that she becomes in different stages of her life.

Daughter of Death could refer to the manner of her conception, which was during Roerts Rebellion (where many died) the fact that he father died before she was born and her mother died giving birth to her, which was during a storm, which is generally a metaphor for Bad stuff happening.
Slayer of lies might refer to the time of her life she is currently in, or is about to enter, when she starts kicking ass again and destroys the pretenders who are around her, and the pretendors to the throne.
Bride of fire to me, could mean 2 things. If aemon and Mel are right and AA=tPtwP(=Dany) then her "husband" could be lightbringer, in either a metaphorical sense in that lightbringer isn't a sword, but a metaphor for a perso, or as an actual sword (I am reminded of Asha Greyjoys "husband" which was an axe) OR if Aemon is wrong and tPtwP is NOT AA, the bride of fire could mean her husband is AA reborn, whoever that turns out to be.