Just a few Q's before I take a jump at this, 1. What town are they situated in, should the Winchesters already be there? 2. If I'm portraying Dean, well come on now I need Sammy too, who's bringing him to life? 3. Your forgot to add Kevin to your list! 4. Have all the angels fallen here or is this to be taken as before the trials and such? Where in the verse would you think this setting would take place? Thank you!
Or you could think about all that's happened within the RP or story you're working on so far, and in going through it, you get something, that little spark on what should happen next. Trust me, it works! Good luck! ^^
That my friend is called WRITER'S BLOCK!*lol, I suggest you get up, do something like IDK sweep the floor and let your mind spin-wheel on thoughts until you figure out something. Just let your thoughts flow and then BAM you got it.