How can anyone hate the Men of Letters thing?* I just keep thinking about the Batcave and the possibilities and I'm DYING!
*disclaimer, cos I'm paranoid atm - obviously I understand than people CAN and that's fine. I'm using dramatic, rhetorical turn of phrase to emphasise my personal excitement, kk?
And once that's up and running, the smart thing to do would be to have someone manning the database all the time, like an Oracle, available not only to Sam and Dean but the hunting community at large. And that person could also be the new Bobby, answering phones and being fake FBI. So maybe different people could take turns, like Garth could be there one month, then Amelia could take over and stuff. Or maybe Sam and Amelia could just settle into the place and run it themselves, so Sam could be in a settled down life but also immersed in the supernatural/hunting world, and free to take on jobs every so often if there's no other hunter available because Amelia can run the Cave in his absence.
Or maybe the database could get super savvy and start keeping an eye on media reports, maybe even identifying cases, so whoever's manning the database can see which hunters are near by and start allocating cases to hunters (like Garth is already doing, only more efficient).
Plus if we assume there's like a stock room or something in the Batcave, of angel feathers and other magical items, then it could be a go-to place for useful weapons and the like. With Kevin and Cas, maybe, being on hand to put the magical stuff together, and Cas could use what's there and bits and pieces of info in the library to create his own spells and magical cures because he's good at that shit, so it would be like - hunters report to the cave to be sent on missions and Kevin and Cas are the magical tech department, acting like Q and equipping everyone with what they need before they head out. And Cas would always bitch at Dean for being too gung-ho and breaking all his gadgets!
Though Cas could also be an on-hand healer, perhaps, if he keeps his angel powers - if ever a hunt goes badly south the hunters could contact the Cave and Cas could zap out to them and fix them up and help out. That would be a nice way for him to continue his 'penance' I think.
Then there'd be the training room, of course, where Dean trains up the new recruits, like Batman trains the Robins on how to fight. Only maybe there'd be a load of hunters training all at once, like the Potentials in Buffy, and Dean would be a drill Sargent getting them to do laps and press ups and bitching them out when they take more than 5 seconds to put a gun together. Only none of the trainee hunters can hate him, because when they're not training Dean takes them out for drinks or sets up epic poker games, or video game nights, and sometimes table top role playing whenever Charlie stops by to visit :)
Maybe they'd be scared of training with Benny though, because he's a real monster and doesn't go as easy on them as Dean.
And some hunters might not be good at fighting at all, so Dean sends them to Cas who teaches them spellcasting.
And Sam would run something like a classroom on monsters teaching all the lore on them, how to identify and kill some of the most common ones, and also how some of them aren't evil and stuff like that.
So we've got the Batcave, Avengers HQ and the X-Men mansion all rolled into one (I just can't figure out who'd be Alfred/Jarvis). I mean, THIS COULD WORK, couldn't it? SPN is a hop, skip and jump away from a comic book fantasy already (with it's ties to Hellblazer - and fyi, Constantine is in a version of the Justice League right now, so the idea of 'loners joining a team' isn't unprecedented or anything - and all the Batman references, and that one time Dean implied Bobby was Xavier and all the returns from the dead and stuff).
This has every possibility of being a DREAM COME TRUE for this show. Do we think it could be? COULD it be??
Plot twist: the plane crash was an illusion and neither Mark nor Lexie died and Arizona still has her leg and Derek's hand isn't messed up and April stay far far away from Seattle Grace.