
I'll go with the Asgardians winning, contextually, whatever the "ultimate goal" of the conflict is, but at a terrible cost in attrition (Odin goes down, as do many others, such as Enchantress ironically, Thor and Loki survive, and have to find a way of getting along in the aftermath of this "unexpected Ragnarok".

The Olympians classically wield greater power, innately, as Zeus and his brothers and sisters are a step closer, overall, to the divine power of the world (wheras Odin, and a handful of others, had to gain much of their power over time) but that isn't as true as it used to be, especially with the gradual loss of power from the past two major battles (and losses) against foreign powers (Darkseid, et al) - they aren't quite so powerful anymore, and not able to fight with the same fervor as in ages past.

The Asgardians are a more brutal lot, overall, and classically are willing/expecting to die in a great and glorious battle, anyway, and therefore, paradoxically, have the most chance of winning *if* "the warrior spirit" were all that were required to win.
