If BBC had continued with ArthurxMorgana I figure this might have happened:
"Arthur Junior,Arthur Junior,Arthur Junior," Arthur repeated over the crib. The baby looked up at him blankly.
"What are you doing?" Merlin asked.
"If Arthur Junior is the baby's first words Morgana might let me name him that," Arthur admitted. Then he gave Merlin a stern look. "Merlin if you tell anyone about this especially Morgana I will feed you to the dogs."
"I won't tell a soul," Merlin promised. "Don't you think that this is a little silly though?"
"Shut up Merlin.".
Then the baby pointed at Arthur and said "prat."
Merlin laughed. "That baby has got great character judgement."
"Shut up Merlin."
