That is very true about Leia. But she doesnt know her mother haha so who know if Organa has her at his side during this and we just didnt see her yet though? Just dont think she would be on her own just yet.

From reading up i think that is Lumiya in the trailer played but the girl from game of thrones. I think they will stick closer to the EU for the movies No reason not too. Also i think it can be her because Adam driver could play a perfect Jacen Solo. Looks the same and makes sense thats the role he can play. Just my $0.02.

I think Folcrum is Ashoka. Why would they keep Organa a secret when they already introduced him and Leia is just a kid during this i wouldnt expect her to be running something by herself or get to involved in the rebellion just yet.

THIS^^^^^^ From the Game of thrones. she is right handed in the show. Also from her having a sword as a prop in the show could of had her ask to make her saber look like a real sword. first thing i thought.