to deny that Daenerys is a clear candidate for the role of Azor Ahai/TPTWP, and to state that the only real Azor Ahai will be Jon Snow, people like to use an argument related to Rhaegar and prophecy. allegedly, Rhaegar ran away with Lyanna because of the prophecy, because he believed that their child would turn out to be the Promised Prince, that because of this, Rhaegar provoked Robert's Rebellion, that Rhaegar ordered the pregnant Lyanna to be guarded at all costs, and if after all this Azor Ahai turns out not to be Jon, then this allegedly would not make any sense.
let's miss the fact that before the book comes out, we can't be 100% sure what really happened between Rhaegar and Lyanna, what were the motives of Rhaegar, etc. the theory that this is related to prophecy makes a lot of sense, given Rhaegar's fascination with prophecy, but it's by- it's just a theory. I don't want to remember the HBO adaptation, but if believe it (we won't do that), then Rhaegar ran away with Lyanna only because of love. no other motive other than "love" was mentioned, even the theory that Rhaegar was motivated by a prophecy was not confirmed in the show.
anyway let's just take it on faith that Rhaegar did what he did because he believed that TPTWP would be born from their union with Lyanna. this does not change the fact that Dany is still the most likely Azor Ahai, who fulfilled literally every point of the prophecy. but now it looks even more interesting.
Rhaegar ran away with Lyanna and provoked Robert's rebellion, which destroyed the entire Targaryen House because he believed it would lead to the birth of TPTWP. He believed that TPTWP would turn out to be his son, but the prophecy is insidious, remember? Before that, Rhaegar thought first of himself, then of his son from Elia. The actions of Rhaegar, which he performed to fulfill the prophecy, led to the fact that pregnant Rhaella, along with eight-year-old Viserys, were forced to flee to Dragonstone, and in the greatest storm in the history of Westeros, Daenerys Stormborn was born, born among the smoke and salt.
Because of what Rhaegar did, his dynasty was destroyed. Daenerys and her abusive older brother were forced to survive on the streets until she was sold into sexual marital slavery to Khal Drogo so that Viserys could get an army and recapture the Iron Throne from the man who took it from the Targaryen dynasty because Rhaegar took Lyanna from this man. At the wedding with Khal Drogo, Daenerys was presented with three dragon eggs. she entered the funeral pyre with them, seeing the bleeding star, and woke up the dragons from the stone.
Daenerys has always been underestimated. she was never considered a worthy candidate. Viserys sold her to a Dothraki to make himself king, Illyrio has been secretly working all this time for the ascent of the Young Griff, and he certainly did not even think that even if Daenerys survives, she will become a powerful queen in her own right. would it be not surprising that Rhaegar would sweep her aside and not even take her into the equation, believed that TPTWP would be his son? because "no one thought about the girl, a prince was promised, not a princess." but again Daenerys deceived the man's expectations.