My thoughts, for what they are worth: It's not that I want
the mother to die, it's that her dying is the most logical reason for Ted's reaction after he made the comment about what mother would miss her daughter's wedding. If it's a fake out, they better have a damned good explanation.
With the rumors and Ted's line, I can live with the mother dying, knowing Ted had some great years with her. That's not saying I want her to die, mind you.
However, I feel as if they use that line as a fake out, with a half-assed explanation, that's
what I'll remember about the show. It'll be the "there was another world"/"they were dead all along" of this show, for me.