I think Loki is too big a topic/character to have discussion about him limited to the other various Thor threads (and, hey, Sinestro got a thread ).
(Spoilers are from the Protosevich draft)
Spoiler!!! Click to Read!:
Anyway, I really liked how Loki was handled in the Protosevich draft. He was very much the trickster we know & love to hate, doing nothing overly complicated yet thoroughly ****ing up Thor's life. However, his descent into villainy felt a little sudden - one minute he was Thor's brother & friend, the next he's planning to overthrow the people who raised him as their son because Odin killed his true father, Ymir, years ago. I hope this has been addressed and his descent has been fleshed out a little bit in newer drafts.
I also hope his father is restored to Laufey. I have no idea why they made Ymir his father
I LOVED that he had his classic costume for the final showdown and I also liked his relationship (if you'd even call it that) with Karnilla.