It's been a while since this was discussed...but regarding the Season 12 big bad..

The UK Men of Letters organization was taken over by Nazis, and in the quest to defeat them and their crazy magical plans and using monsters to do their bidding, it is discovered that they are being controlled by their leader....ADOLF HITLER'S HEAD IN A GLASS JAR OF LIQUID!!!

But in all seriousness, Dean has gotten to kill just about every monster out there except for Nazis...Imagine how stoked he would be to kill some damn Nazis!

As for the UK Men of Letters blaming Sam and Dean for all the horrible things that happened, let's just look back on them:

• The Apocalypse - This was the work of Angels manipulating the playing field.

• The Leviathans - Once again, this was 100% Angels, the war between Castiel and Raphael.

• Metatron and evicting Heaven - This was Metatron's doing, with manipulating Castiel of course.

• The Darkness Now, this one COULD be seen to be their fault, but still, UKMoL seems to want to place blame on the brothers, but they never wanted to do anything to help with the previous incidents.

So, with all of that, I am keeping my fingers crossed for some damn Nazis!