George R. R. Martin confirms Daeron Targaryen is in Oldtown and will arrive in House of The Dragon Season 2
Martin wrote on his blog, Not A Blog:
"I wanted to address the “time jumps” in the HOUSE OF THE DRAGON too. Not with any kind of official “statement,” but with some musings on the subject."
"Very briefly, however, I think Ryan has handled the “jumps” very well, and I love love love both the younger Alicent and Rhaenyra and the adult versions, and the actresses who play them."
"YES, Alicent gave Viserys four children, three sons and a daughter, their youngest son Daeron is down in Oldtown, we just did not have the time to work him in this season."