Hi Maria.
I'm Rachel. Thanks for pitching in here in Steph's absence.
I think the possibilities are endless for a ST sequel. The only thing I know for sure is that we won't see Leonard Nimoy again, since he has retired from acting.
Olivia doesn't really have any friends other than Peter, Walter & Astrid, but she does have a sister and a niece. Her scenes with her niece are very sweet. Perhaps, the entrance of the niece is when I started liking Olivia.