Here is an interview with Daniel with some info on the Finale.
The burning question of who, between Jin and Sun Kwon, is the "candidate."
"It's only the last name, and as far as I know there are three Kwons."
Will Jin and Sun's daughter play an integral part in the last few episodes?
"The daughter will be...how do I put this without saying too much? The daughter will play a role in the final episodes."
What can you say about the final episode?
"I think that the finale has a lot of emotional impact and I hope it will resonate with the viewers the way that it resonated with me."
Source: Full Interview @ Parade
"It's only the last name, and as far as I know there are three Kwons."
Will Jin and Sun's daughter play an integral part in the last few episodes?
"The daughter will be...how do I put this without saying too much? The daughter will play a role in the final episodes."
What can you say about the final episode?
"I think that the finale has a lot of emotional impact and I hope it will resonate with the viewers the way that it resonated with me."
Source: Full Interview @ Parade