I don't even watch the show and I knew Izzy was dying lol.
My friend was talking to me about how Denny came to her in a dream saying something like "I've come for you" and she took it to mean Denny was coming to take her back with him to wherever people go when they die.
I'd, also, heard rumors that Heigal has gotten a bit too big for her britches and has diva-like tendancies on set. So, rather they put up with it, they're killing her off.
"All our dreams can come true -- if we have the courage to pursue them." -- Walt Disney
We must have different Gods. My God said "do to others what you would have them do to you". Your God seems to have said "My Way or the Highway".