Hmmm . . . I've always kinda wondered what would have happened if the Stargate people had somehow ended up in control of the Initiative . . . would it have still self imploded or would Daniel have managed to set up cultural exchanges between the various demon tribes? ;) Or, to go another direction, I've always thought that if Stargate and BtVS were in the same universe, Senator Kinsey would have probably been on the oversight committee . . .

And while we're on Stargate, I feel like we very rarely see enough of mini!Jack.

Some sort of Sentinel/HP crossover? I have no idea how that would work though. :)
But pretty much anything you write I will very happily read!