I think Jude's most definetly gonna sneak back into Faerieland without Carden's approval, but he was probably expecting her to do it.
Madoc knew that Cardan was under Jude’s command, Cardan needed to exile Jude to prove that wasn’t the case.
Cardan wanted to be Jude’s equal when they finally (hopefully) rule together. To do that, he had to send his “Seschenal” away to prove he could rule on his own terms
I think Jude might get vivi to sneak into Faerie for her to figure out a game plan
I think Nicasia or Locke are going to die
Based on the cover of queen of nothing, the blood crown will break so either there won't be a king or it won't be the same. I think Cardan knows that there is war brewing that's why he took Balekin's death as an excuse to banish Jude-protect her.
What do you think?