Perhaps not an entirely different forum, but a new section to this one; If you click "HOME" under your avatar thingy on the upper left, you're taken to a page with all the sections inside "Carl and Pam's Sims 3 Forum", with + and - buttons, so an idea would be making another oversection (I don't know if that's what it's called) and name it "Carl and Pam's Sims Medieval Forum" or something like that.
Now to my opinion on Medieval:
I think EA finally managed to figure how to bring back the Makin' Magic expansion (with new features) without harming the entire game (Apartment Life's magic was too chaotic and messy). I like it that they kept the UI pretty much the same, but orange doesn't seem to fit it.
I was honestly dying for a new medieval game, as all my other ones got either completed or boring. The fun thing of Medieval is that it will obviously have it's own continuations. The Sims 2 had the whole The Sims Stories parallel, The Sims 3 will have Medieval. It's not called "series" for no reason.
By the way, new simlish words! (Or old words? Because it's on medieval times...)