1. Warriors to the end -- I'd love to see a story in which the relationship between the two is already established, but a new obstacle/challenge/battle/revealed secret threatens to tear them apart: an old lover returns, a new law is passed that threatens their happiness, or death eaters/werewolves with a score to settle. Something romantic, post-war, DH compliant except for neither Remus or Severus die.
2. Soulmates Forever - Reincarnation fic, DH compliant, with a twist. Remus and Severus as we know them are the later reincarnations of two wizarding gentlemen living in Elizabethan England who shared the same names. The events of the wars against Voldemort have been coming to each of them in dreams and premonitions. Court intrigues abound as they begin to realize their visions of the future are also warnings of an assassination plot in their present.
3. Steampunk Snupin - Leaning more to the gaslamp romance/swashbuckler variant, airships, pirates, swooning ladies, and scientific rakes. Severus has been charged by the Crown with bringing to heel the renowned pirate crew of the Airship Maurader. Only things are not as they seem. The pirates have an unknown, but honorable purpose of their own...and Severus finds a decided distraction in the personage of the ship's navigator, Lupin. **Art inspired by this prompt would be equally as fabulous as fic!**
4. Otherworld Inspiration - It took a while, but the wizarding world has finally come into the technological age along with the rest of the world. Now, in a "not so distant future" virtual worlds like Second Life have advanced into a nearly complete Virtual Reality existance. But, something is seriously wrong, people are disappearing in the real world as a result of the virtual, including Teddy Lupin, only son of widower Remus Lupin. When Remus goes in search of answers, he finds help in the form of a mysterious hacker who seems to know more about both the disappearances and Remus himself than he should.