While her being a loner won't be changing, her backstory will. I won't go into the specifics, since I want to make the appeared scene extra special, but I will say that how she meets Lion will be drastically different from how they met in A Prophecy of Four.

Instead of watching her parents die, her parents will have already been dead by the time they have met. Everything after is a big secret. You'll have to read Arising Shadows after its completion to know what I have in store for Dawnstar (: