>>3506955>I think Jensen’s problem has always been with leading fans onto believe it was going to happen when he knew it wasn’tAgreed. I think he also knew that making Destiel canon would have likely lead to Castiel's death, because the show runs on suffering and a happy couple would have been antithetical to drama and narrative tension. Even sitcoms know this, which is why they keep their leads in an unending will-the/won't-they cycle. Supernatural has essentially been doing the same thing for 12 year, but since the couple is same-sex it's been more ambiguous to some people. The only way they could resolve it with a happy ending is if they did it when the show was going to end anyways, and Jensen understood that. He didn't want Destiel to be canon because he didn't want his best friend killed off and written out of the show.
Also, on the topic of them not telling Jensen about the ending until just before shooting: Jensen himself has said that he doesn't read the scripts beforehand because he doesn't want knowledge of what's to come to subconsciously inform his acting decisions. It makes sense that they would have told Misha first, since Castiel obviously knows the way he feels about Dean and has been thinking about what a moment of pure happiness would look like for him ever since he made his deal. On the other hand, Dean, if he is aware of the thing between him and Cas at all, probably understands it at a more repressed and subconscious level, and it's not something he would be actively thinking about this season, so why would they give Jensen the heads up?
Other points: Jensen directed 11x03, which included scenes of aggressive blanketing and tender face-holding. He has apparently acted out tender face-holding before, but the directors always cut it out. Also, Danneel clearly ships it, and he'll do whatever she says.