As far as Hook getting resurrected, I am very torn. We all knew he was going to come back. Honestly, a God like Zeus pardoning him and bringing him back is waaaaaaaayy better than some magic macguffin he could have found in Hades’ lair. However, the reasoning behind Zeus’ decision is questionable. And this is where I really wish we got a backstory of him and Hades. If we saw how much he loathed Hades, or how horrible Hades was to Zeus, it would make a little more sense why Hook helping the others kill him would rank high in his books. Maybe Zeus is a little corrupt with his power? Maybe Robin should be brought back to life, but maybe Zeus is corrupt and doesn’t really care. Maybe he hated Hades so much that the small thing Hook did was worth saving him in his eyes? But again, we won’t understand Zeus’ motivation or behavior because we didn’t see him and Hades interact at all in a flashback. I think a flashback would have helped this scene immensely.
But again, you guys never let down all the not so great things Hook does and says, but when he does good things like saving Arthur and helping him find his purpose and redemption, and then helping to to kill Hades and therefore helping to save Regina and Emma and everyone (despite Zelena finding the crystal information out herself), we need to highlight them as well. I don’t care if Hades told Zelena about the crystal. It was Hook’s intentions that in Zeus’ mind, made him worth saving. But I think this episode showed how far Hook has come, and despite the many flaws he has, like we all do, there is no denying his undying love for Emma and now he’s started to save others too. He could have let Arthur die people. He chose not to. That’s a big step for the character, I thought.
Now as far as Robin coming back goes, I too think we’ll see him again. The crystal was likely made by Zeus so if anyone can bring Robin back, it would be him.