As seen in this trailer, Sam and Dean Winchester reunite after Dean and Castiel were teleported to Purgatory at the end of the last season. Even though we won't know how Dean escaped until far into the season, we can be sure to expect plenty of twists and turns in this new season. During Comic-Con, new showrunner Jeremy Carver stated
"They are just as open to new relationships and beginnings and endings as anyone else in the world. They're going to have to come to terms, like any partnership, with dealing with the new relationship in each other's life.", and the trailer definitely makes it seem like the Sam and Dean bond will be further explored. Anywho, check out the awesome trailer below!