Wow Boaz, your post are very interesting though they reminds me of husband-wife conversations like:
H: It's a nice pink dress.
W: Pink? It's not PINK! It's peach-orange! Do you think I look pink in this dress? Like Miss Piggie?! Do you think I'm a big fat pig?! That's it, I'm going to my mother!
I'm still convinced that Jon is one of the heads (and I still think they are-Dany, Jon and (ex-baby)Aegon wherever he is).
I believe that prophecies have a great power, you have a House of Undying prophecies: about baby Aegon (suggesting he is alive) and "A blue flower grew from a chink in a wall of ice, and filled the air with sweetness " - Blue flower - winter rose in a wall of ice - Jon who will feel the air with sweetness for Dany... (A bit gay for Jon but still...)
Who is a better head of the dragon than Rhaegar's own son?
About Jon and Arya - It's not like GRRM at all (I hope), I think Jon would never think of Arya in that way.
ras'matroi - all those things about Tyrion suggest that he is the one who fits a very important job - Dragon trainer (Dany desperately needs one and soon)