I understood it was a cross-dimensional plot, involving alternate worlds, not future and past versions of the same world.
Mirror Mirror does not involve time travel.
Cross-time is a early name for travel between alternate realites, (alternate histories), a sub-type of time travel according to wikipedia on time travel.Since the 1950s, this type of fiction has, to a large extent, merged with science fiction tropes involving time travel between alternate histories, psychic awareness of the existence of one universe by the people in another, or time travel that results in history splitting into two or more timelines. Cross-time, time-splitting, and alternate history themes have become so closely interwoven that it is impossible to discuss them fully apart from one another.We know there will be a book on Time travel per Harry later in the Case Files, so again this verifies the "impossible to discuss them [time travel, alternate history] fully apart from one another." In addition, there have been mathematicians that describe the type of mathematics that would be at play in such a universe that allows what has been described as existing in the Dresdenverse, (time travel, travel between parallel realities, etc) that mathematics requires further TEMPORAL factors in addition to the time factor we are use to. So, there would be in fact a temporal travel at play, but one not "time" as defined by ours.
And then they changed form based on our dreams?
I'm sorry, My responses are limited. You must ask the right questions.
...And so as long as men die, Liberty will never perish.
Maybe the Never-never is similar to Lovecraft's Dreamlands?
“Gosh, you’re cute when you’re angry,” I responded. Her eyes narrowed dangerously. “It makes your little button nose all pink and your eyes get bloodshot and even bluer.” “Did you have any last words, Dresden, or should I just choke you now?”
Hasn't Murphy placed Harry in a choke hold before?