Hmm, interesting request. I'd love to read some myself. I can think of several which sorta kinda fit your request, and I listed them on another request several days ago. In the meantime, here's a ficlet:
Trickster's Proposition by Runic Summary: Tony is not surprised when the Norse God of Mischief appears in his lab. Hephaestus had told him the Trickster would likely show up at some point. http://archiveofourown.org/works/620015
And I just remembered this AU: Divine Yet Fallible by Graceful Storyteller Even now, after everything he has been through, Steve can still remember the prayers his mother taught him as a child. In which worship of the Norse gods is the world's main religion and Steve is a true believer. http://archiveofourown.org/works/540071
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Trickster's Proposition by Runic
Summary: Tony is not surprised when the Norse God of Mischief appears in his lab. Hephaestus had told him the Trickster would likely show up at some point.
http://archiveofourown.org/works/620015
And I just remembered this AU:
Divine Yet Fallible by Graceful Storyteller
Even now, after everything he has been through, Steve can still remember the prayers his mother taught him as a child.
In which worship of the Norse gods is the world's main religion and Steve is a true believer.
http://archiveofourown.org/works/540071