Jon Snow is the real Aegon.
I am not saying that Jon Snow is literally Aegon.
Varys gives Kevan a monologue on Aegon as Kevan dies about Aegon. Was it truth, lie or some sort of double speak, who knows. The point was that Aegon was groomed to be king and see it as a duty and not a right.
To me Aegon real or fake still has fake molding to become king. He still is brash and looks as himself as the rightful king. That's one thing took away from his character counter to Varys statement.
Jon Snow on the ot
But in that instant, as he twisted, the opening was there. Jon planted and pivoted. The ranger was leaning away, and for an instant it seemed that Jon's slash had not touched him. Then a string of red tears appeared across the big man's throat, bright as a ruby necklace, and the blood gushed out of him, and Qhorin Halfhand fell.
GRRM established that rubies can be seen, represent or symbolized as blood.
"Rubies flew like drops of blood from the chest of a dying prince..." - ACOK Dany,