Obviously by "The Banshee" we can assume they mean Silver Banshee. I may not be extremely excited over the inclusion of Silver Banshee but it's always nice when the show's producers use actual comic book characters instead of trying to create some random generic villain. As for the story with Lois and Clark staying at a bed and breakfast...I'm not so sure about that.The Banshee is a vengeful spirit of a fallen Gaelic heroine. She's accidentally released from the underworld, and takes out her vengeance at an unassuming country bed and breakfast. Guess who just happens to be staying at the B&B? Lois (Erica Durance) and Clark (Tom Welling).
Let's hope that they keep her appearance close to her comic book counterpart. It'll be interesting to see what effects they use when Banshee uses her powers. I wonder if we'll see even more guest characters this season.