I have a problem with Tyrion joining Dany. Yes, Tyrion loves dragons. Yes, Tyrion is fascinated with fire. Yes, Tyrion wants vengeance upon all of Westeros... and Dany is brining the pain. Yes, Tyrion has experience in many facets of the governance of Westeros. BUT, Dany will most likely kill any and all Lannisters, Starks, Baratheons, Arryns, and Tullys that she meets. Tyrion's mouth damn well got him into this mess so it damn well better get him out, to paraphrase the Imp himself.
Dany is running a foster home for ex-slaves, but I don't think Tyrion will be able to pass as a slave. He needs to bring something to the table for Dany. Tyrion's ace in the hole, will be Illyrio and Varys. They will tell Dany that Tyrion is actually her half brother. A second head to the dragon will please Dany greatly.
So if Tyrion has this to offer Dany, why would she (of all people) ever make peace with the Kingslayer? Of all people in the world, Jaime is number one on Dany's list. There can be no reconciliation of Daenerys Stormborn Targaryen and the Kingslayer.
Some of you might remember me trying to come up with a grand unified theory of everything over the summer. Well, I failed. But the heart of it would have been that the mad king Aerys II fathered more than just Rhaegar, Viserys, and Daenerys. According to that theory, Aerys also fathered all three of Tywin Lannister's children upon Joanna... Cersei, Jaime, and Tyrion. And last but not least, Aerys raped Lyanna, Rhaegar abducted Lyanna to keep her from being killed by Aerys, and Lyanna gave birth to Jon.
So actually, if Jaime was Dany's older brother, would that reconcile them? Most likely no, but reconciliation is now within the realm of possibility.
But here is what I really want to get to... If Aerys fathered all of Joanna's children then Cersei and Dany are sisters. Cersei is worried about the Valonqar and the younger and prettier Queen. What if Dany were both? Yes, Dany is younger and prettier, but she's Cersei's younger sister not younger brother. Okay, but remember that Aemon and Rhaegar had intrepreted the Targaryen prophecy as The PRINCE that was promised and not as The PRINCESS that was promised... i.e. the Valyrian word was misinterpreted into the Common Tongue. What if valonqar does not mean younger brother, what if valonqar means younger sibling?
Remember when Catelyn tried to talk the northern lords into peace after Eddard was killed? The men told her that was was not for women, to which Catelyn replied that she'd strangle Cersei in a heartbeat given half a chance. Could be foreshadowing of a woman choking the life out of Cersei.
The problem with the grand unified theory is... well, there are lots of problems, but one of them is Baby Aegon... I cannot fit him into it.
And at the end of the day, it will be much sweeter if one of her own sweet brothers chokes Cersei.