Yea man,i just kinda feel that some questions might never be answered,the big ones will be for sure but the smaller one like 10th,2nd and 8th wont,eventhough it would be cool to know that especially the dragon interactions.

So Ill just give more of my input to some questions:

1.Yes we can speculate the cause of her death,but i think there will not be a plot driven by some awfull cause of death like a curse or something else since we will be looking at a bigger picture in Ragnarok and other stuff. But damn i could be wrong,still dont believe they will focus on that so much.

4.Can you give me more info pls,is that the mural from Jotunheim? And where did you come up with a name Heather?

5.He did say that the giants are really gone,so he acknowledged that they are no more hence he did see the bodies so I must disagree with you. I believe that throughout the game he got more and more emotionally balanced from Kratoses teachings.

7.Yea,imo it is Loki from future,but dont understand how theyll explain the time travel paradox if that version of the serpent is sent back in time via Ragnarok fight with Thor,and the serpent is yet to be born (created) as Lokis son or whatev.

Only scenario which makes sense is that in time of ragnarok there will be 2 serpents present.

8.Would be cool for sure.

9.Well the thing is that Odin corrupted (cursed) them to stay in ther physical from which if they are for a long time physicaly present in any realm they are driven mad and uncontrolled so for that i can presume that their true form is the spiritual form which you can see after they were killed. With that in mind i think they will continue to do their work and in GOW5 there will be less undead mobs and maybe more asgardians and elfs. That could make sense since you did most of the things in midgard sidequest-wise and main quest so the story will progress in the other realms (My theory cause the undead floded just midgard).

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Cheers my man