I know there have always been and will always be fights and flame-wars between different parts of fandom (Samgirls vs Deangirls, Wincester's vs Destiel) but it seems to be getting worse and more over the top. This is one more reason I try to stay as spoiler free as possible. So I can avoid all the fan-wanking and fights that seem to come with even the most vague spoilers.
[S8 Castiel spoilers below]
Blanket statement re: Castiel & Dean - if, perchance, you've read my recent Misha spoiler article (http://www.tvovermind.com/supernatural/supernatural-spoilers-misha-collins-reveals-castiel-fate/#comment-356401) please do not jump to conclusions about Castiel and Dean fighting or not speaking or whatever other assumption you might make just because I happened to write that Castiel and Sam might spend a little time together.
First, the two of them have had a rocky relationship, so there's hardly anything wrong with spending some time together. Second, Misha and Jared really wanted an opportunity to riff on each other in good fun. Third, Misha spoke about Sam because we happened to ask him something akin to "if Cas is jealous of Benny [which we know since it's previously been published], then might he spend any time with Sam?" It's a perfectly innocent question born out of an established dislike between characters (Castiel and Benny). Misha specifically said they had only just started to explore any dynamic between Sam and Castiel. That HARDLY means they're going to run off into the sunset together and forget all about Dean, Amelia and/or the dog.
There's no adverse Dean & Castiel conclusions to be made here. And it hardly means that Dean is going to be written off the show or SPN will become the Castiel/Sam variety hour (although that might actually be amusing). What happens with them or any other friendships is up to everyone - including me - to see.
So, it seems to me from what Clarissa has written here and reading some of the comments, that the Dean/Cas fans are upset, (jealous even) at the thought of Sam, (one of the 2 lead characters) having 1 or possibly more scenes alone with another major character that has been on the show for 4 seasons and who played such a significant part in Sam's storyline. That it will suddenly turn into the Sam/Cas show with Dean on the sidelines or even (gasp) written out of show!!!!
Funny thing is, I seem to recall all of these same fears coming from Sam-fans when Cas was introduced in season 4. The more things change, the more they stay the same, huh? And now, with Benny as Dean's new BFF & substitute brother, some Cas and Sam fans are feeling left out and having to commiserate each other.
I, for one, am really looking forward to seeing some more in-depth interaction between Sam and Cas. I even still have a tiny bit of hope that it may one day be revealed to either Sam or Dean or both that it was Cas who let Sam out of the panic room in 4:21, thus enabling Sam to kill Lillith and break the final seal.
To end on a lighter note, I got a chuckle out of reason #2: Second, Misha and Jared really wanted an opportunity to riff on each other in good fun.--- I just hope Jared will go easy on Misha and let him do his coverage without too much interference, but I'm not holding my breath that Jared will behave. Am hoping for some gag-reel goodies from those scenes.