Spire

Odium and devotion make more sense as opposites; hatred of all that is different versus commitment to something other than yourself. Also, in my opinion, Endowment and Cultivation are opposites: Cultivation: Assisting something to grow naturally. Endowment: Granting something directly, i.e. not through natural growth Which would leave Honor as the odd one out, for now.

What about Endowment as the opposite of Cultivation? Growth from without as opposed to within?

Harmony seems to take a much more active involvement in Scadrial than, say, Endowment or Cultivation do. He's got agents that move among the people, he plans out their technological and cultural development, and he intervenes through Marsh, Wax or TenSoon where necessary. If Bavadin were to go after anyone I'd expect it to be Harmony. As for how much he's willing to invest, that's why I think he's teaming up with Bavadin - alone, he's going to get smashed. But Ruin has a part of his power lost in atium, and Preservation has fragments of his power within every human on Scadrial...which gives Odium and Autonomy the leeway to spend a few fragments of their power to create god metals.

You're absolutely correct - Devotion is not love, because love is just a subset - an example - of devotion. Odium is "the weight of God's divine hatred". A hatred of everything: other shards, other ideologies (why he doesn't want to take up other shards), other beings (look at the whole Desolations thing, where he's killing people Just Because instead of going after Cultivation). The idea of devoting yourself to another entity or a cause - because you believe in it, because you love it, or because you think it's worth protecting - makes far more sense as the opposite of Odium than 'love'.

Okay, so here's what we know: Rayse/Odium Trapped in Greater Roshar Scared shitless of Harmony (WOB: http://www.theoryland.com/intvmain.php?i=1074#2 ) Shatters other shards through "skill, ability, numbers or possibly un-dispersed power" (same WOB as above). Shattered Devotion and Dominion. Bavadin/Autonomy Bavadin's shard is Autonomy (WOB). Hoid talks about Rayse and Bavadin in the same breath, suggesting some sort of connection or similarity. Shadows of Self The mysterious new God Metal belongs to a Shard we've already seen (WOB). Bleeder is frothing at the mouth about freedom and clearly hates Harmony. Aaaand here's my speculation! Odium wants Harmony out the way because he's a threat (but has trouble acting since he's trapped in Greater Roshar), and Autonomy wants Harmony gone because that lines up with his intent. Neither of them are going to move against two shards alone, because it's a great way to get dumpstered. They're moving against him together. And what's more, they've done this before. We know that not all shards have opposites but that some do (WOB). Hatred and Autonomy...what's the closest thing we've seen to their opposites? It's got to be Devotion and Dominion. My money's on Bavadin being involved - he helps Odium shatter his opposite and in return Odium does the same for him. Everyone gets what they want (unless you happen to be Aona or Skai in which case you end up dead). And it laid the basis for them to work together in SoS against Harmony! Thoughts?