Possible spoilers for everything through everything that's happened so far
Is Aegon Targaryen (son of Rhaegar & Elia) still alive?
It states here that
"Aegon has been shaped for rule before he could walk. He has been trained in arms, as befits a knight to be, but that was not the end of his education. He reads and writes, he speaks several tongues, he has studied history and law and poetry. A septa has instructed him in the mysteries of the Faith since he was old enough to understand them. He has lived with fisherfolk, worked with his hands, swum in rivers and mended nets and learned to wash his own clothes at need. He can fish and cook and bind up a wound, he knows what it is like to be hungry, to be hunted, to be afraid. Tommen has been taught that kingship is his right. Aegon knows kingship is his duty, that a king must put his people first, and live and rule for them"
As we all know recently it was revealed in the show that
Jon Snow's real name is Aegon Targaryen
Since it states that Varys has been protecting this character since he was a baby. (It's possible he knew about Jon).
So it makes you wonder if he was talking about Jon or the other Aegon. Also I know it says that Gregor Clegane smashed his head in...but maybe that was to cover up identifying the boy?
Is there any proof? Or is this just another "not enough details"?