I was thinking something along the lines of 'Gladiator'.
Ronon and John should not know each other in the beginning.
Following loosely the story line of 'Gladiator' Ronon (and maybe John as well) is forced to fight for his life in some kind of arena as a gladiator (He is a slave of course to the empire. Be it the Roman Empire or any fictional created alien empire on a strange planet, I do not care) . I imagined John being a captured 'German or whatever' tribe's leader who is very proud and will not bow easily to his new masters at which hands he has to suffer a great deal of pain (torture, humiliation, rape etc... the more shep-whump the better).
Ronon takes one look at him and decides that he wants him (He's also quite raptured and fascinated by John's willpower and pride and the way he fights against his capturers). But of course (at this point of time) John would never ever allow another man to touch him without at least killing that man in the process.
Their masters on the other hand think it an appropriate punishment for John to be thrown in a cell with a huge man that is likely to rape him.
But Ronon is a man of honour and would never take someone without their consent so there is a long journey ahead of those two in which John needs to gain trust and to learn how to love Ronon and Ronon needs to control his raging desire for the man who's in such close proximity to him.
Eventually they should end up together (I want some happy fluff moments) but the end of this story can be either happy or sad.
I do not care if there is an occasional OOC-moment...in an AU like this that has to be expected. Both John and Ronon shouldn't be too civilised meaning that there can be the one or the other primitive cave-man trait to their characters (we are talking about a society that has slaves and warriors, right? Lot's of wild men running around). Maybe some communication problems can be added (crated by the many different languages and cultures).
I like to see all of the stargate characters filling in even the smallest roles so feel free to use whatever SG-1 and SGA folks you want.
I love to read long stories (of epic proportions) so please don't make this a short-story. Also I'm a history-freak and appreciate properly researched AU's that deal with the past...(of course that doesn't mean that there has to be a ton of facts in this fanfic! there don't have to be any at all but IF there are I would like them to be correct... but in the case that this story takes place on another planet the history of Earth doesn't matter anyway so who cares?)
NC-17 please?? Other pairings are also welcomed!
I can't think of any (other) restrictions so I'll leave it like this...