Be aware there are spoilers for both the 1989 and 2019 versions of Pet Sematary, as well as the original novel. If you've seen the new spin on Pet Sematary, heck even if you've just seen the trailer (don't read this if you've only seen the trailer), you know that the latest adaptation of Stephen King's classic novel takes some liberties and makes some big swings. Of course, there's the big switch -- it's not the toddler Gage who dies in this version, it's his older sister Ellie, and that key shakeup has …