Yeah the whole Ragnarök thing is not that good explained in the books either but what you heard is also how I will aproach it. Ragnarök including the stuff with baldr is bound to happen. Loki is bound to be chained to a rock etc. I know it does not make that much sense but that is how we will handle it.
Also the story will start with all of you beeing brought together by your pantheons. 
I also somehow was expecting at least one greek because they are so popular but I am actually suprised with the characters you guys made!