screwed-in-the-head cas beat the living excrement outta dean in s8 like “gimme the angLE ipad!!11!” and the only thing that could stop him was dean talking to him in a very platonic bro way, so i think a
how-the-tables-have-tabled parallel will happen in 10x22.
dean’ll probs beat cas the hella up like “gimme my ka-bar bladE!!1!!1″ (remember he gave it to cas in 10x14??) and cas gon be like “but bro. i brove u, bro. need u in such a bro way, broski” so dean will stop and be like “HOLY BRO WHAT HAVE I DONED”
and just like cas took off bc he couldn’t handle having rearranged deano’s face, dean’ll gtfo too, leaving only a bro-ish tear-stained note for his bro of the same mother and his totally platonic do-not-want-to-fuck-him-in-the-bum bro, hence jensen’s tweet about the note and misha’s bloody face.