Star shook her head. "Someone from Clark's past is going to come back and make life hard for you two, but you especially, I think."
'In the absence of the House of Ra, you have my blessing.'
Are you sure that either we won't see Sarah/Zara or that Sarah isn't Zara? Wait, actually you didn't say she wasn't going to be in the story. You just asked why everyone insistes that Sarah was Zara. Hmmm....