I´m kind of ambivalent with Catelyn
I like her, as I said before, and I thinks she´s brave and a loving mother and has great dignity and sense of duty but some times she seems blindsided and the list of wtf irrational choices she does is impressive. So a good person but very failed and able of surprising cruelty.
But I understand she was aghast when Robb wanted to name Jon his heir, she thinks about her two legitimate daughters (even if counting with Arya alive was wishful thinking) whose rights he´s stripping
Hedwig about Jon
I think the Raeghar+Lyanna theory should be proved right, considering all the hints, but I hope there is some kind of twist, and in fact there was some kind of kidnapping, not because Raeghar was a nasty rapist or something like that but more like a fanatic looking for his prince that was promised and third head of the dragon.
I´d love a prequel, too! All what happened and moved to the War of the Usurper, I love all those characters involved