According to our lovely part-time employers:
It's official: Soap Opera Digest can confirm that Louise Sorel (Vivian) is returning to Salem in the fall. Look for her to hit town in late September. As previously reported, Crystal Chappell (Carly) is also coming back to the show.
Mallory could not report this news because she said "eeeeeeee!!!!!" so loud she popped a blood vessel.
As for me, I think Louise Sorel is awesome, but Vivian is from an era of Days that isn't my favorite. Though at this point they could bring back every character who ever irritated me, all at once, if it meant a little forward story movement and less screentime for all these snooze-worthy couples. We shall see.