I noticed Mangog makes the comment that neither father or son are what they once were but I do not know exactly what context he refers. Odin makes a comment about not giving into fear. I do not know if that is a clue something else is going on not evident(Cul?) or just a throwaway line. Odin sounds tough but it doesn't help him in the battle.
Jane also has a line that many here will not like. Her backstory includes throwing in what is apparently an out of the blue history on her husband and sons fate. I may have simply not seen it due to not following the book for the most part. I am not sure what Aaron is trying to convey but to me it makes her seriously unworthy. Watching her mother die from cancer should make her more than happy to accept any cure magically or otherwise. there must be another shoe to drop plot wise. When everything is done I think Asgardia is completely destroyed while everybody ends up back on Asgard though Mangog demolished the area it is still there-I think.
Another blatant rip off with regard to Jane's husband and son. Anyone who has read Chaos War: Thor by J.M. DeMatteis would know that is the backstory of Becca, who helped Thor when he crashed to Earth as Blake after wrecking Glory.