Voidtry & Thanos vs Odin
all out, no wanting to die from Voidtry. No killing your partner from either Thanos or Voidtry. Current Thanos, or near as (since the one who just returned doesn't have any feats yet).
1) battle in Seattle (wonder if I can find a torrent of that film?)
2) Asgard
Odin is ofcourse determined to win and willing to kill (if that needed stating).
if either side is unfairly underpowered, then they get to add a high herald (of your choice) to their side until such time as it makes the battle even.