I agree that I think Richard is going to be a key character if Ben is to go and Locke step up to the plate and lead, which he does believe is his destiny, I just don't think Locke knows yet who or why he is supposed to lead and he will question any and everyone along his journey to find his purpose!

__________________
Please don't give up, Des. Because all we really need to survive is one person who truly loves us. And you have her. I will wait for
you. Always. I love you, Pen

DESMOND: I love you, Penny. I've always loved you. I'm so sorry. I love you!
PENNY: I love you too.
DESMOND: I don't know where I am, but--
PENNY: I'll find you, Des--
DESMOND: --I promise--
PENNY: --no matter what--
DESMOND: --I'll come back to you--
PENNY: --I won't give up--
BOTH: I promise. I love you.