I didn't mean to scare you. A lot of the things I worry about are just hinted, or interpretations on my part, so they don't neccessarily have to mean anything. There is really just one spoiler that I don't like at all.

First for the things that make me slightly nervous:
Misha said something about missing the crew in Vancouver and generally starts talking about the show in the past tense. But apparently they added "on a day to day basis" since I first read the interview, so that's not as worrying any more. Okay, good I took another look then.
Misha also does state very clearly that he doesn't know about "any specific plans to redeem Cas at this point" and that he doesn't know what episodes he's going to be in beyond the first two.
But yeah, that could all still possibly turn out alright.

The one thing that I really, really don't like - and this is quite a bit of a plot spoiler:


Apparently Castiel will not fix Sam's wall because "he wants Sam to suffer for a while".

And that's just going too far into the actual "evil" category for my taste. It probably still can work out. After all Sam tried to kill him, so it it's not as if Cas doesn't have any reason to be cross with Sam. But it worries me. In my head canon, Castiel - even as a vengeful god - will still always try to do the right thing. That's what he wanted, right, to be a better god? And now letting Sam suffer, when he promised Dean that he'd fix him... I feel they're getting to a point where I don't know how they are supposed to fix this any more. To redeem Castiel, there has to be at least something of the old Cas, and of the bond between him and Dean left, that Cas can go back to.
But maybe I'm just reading too much into all this.

I guess it's mainly that all those small things from this interview and that article, that aren't really that bad on their own, just seem to come together and paint this rather dark picture.

But it's quite possible I just worry too much.