That's exactly how I read it to. There's nothing there that says it won't be on there. The wording is just a little tricky and makes it sound that way. All they're saying is that the Machete trailer wasn't a "faux" trailer like the others. Like you said, it's always been a part of Planet Terror, so I assume that's why it wasn't listed in the IGN article. I'm sure it'll be on there.