Don't quote me, but if I see spiderwebs everywhere on all the concept art that I've seen so far for Mistlands, I would think it's going to be very likely that we will see giant spiders roaming through the mists.

And, no. I don't think there will be an "Arachnophobia" switch. Just like there is no "Undead" switch, or a "Green Blob" switch, or any switch for the other nice creatures artists put in games.

It's pretty much the same everywhere else...