Thanks for the follow-ups. As I said earlier, I have been lurking around here for a while and it seems the consensus both here and elsewhere on the web is that Marni is indeed the expert here.
Please correct anything I have wrong in here for me. I want to make sure I have the most accurate information possible as I near my trip date.
I also saw an earlier post about "old information" on the part of the OP. I am wondering if this is the case because, from my reading around here, there was, at one time, a plan to convert both towers. I know it got scrapped because DHS has so few attractions at the moment--and that it probably won't be on the table again until something new opens (which won't be until 2018).
Furthermore, Tower of Terror is the park icon. It's on the website, the app, and the merchandise as such, with one item I saw going to far as to say DHS was established in 1994--the year the Tower of Terror opened.
There has, of course, also been a persistent rumor of Voyage of the Little Mermaid closing, which was supposed to happen in 2015. I'm curious as to where the source of that came from, as it was operational the last time I checked on it.
My guess is the source of the information (for the OP) was a teenager based on having to relocate with the parent. I work with teenagers as a tutor and I know they tend to get facts mixed up sometimes (no offense to any responsible teenagers who may be posting here, but let's face it--I have heard my share of wrong assignments, page numbers, due dates for papers, material to be on tests, etc). I am going to hope this is the case.
Regarding Mickey: he has actually been on the merchandise for at least 16 years. I have a Tower of Terror t-shirt from 2000 with a picture of Mickey stepping into an elevator printed on it. Mickey has a habit of finding his way into merchandise for any attraction because he is recognizable, marketable, and popular (for nearly 90 years). While I have certainly heard a lot about the Great Movie Ride possibly going to a Mickey format, I'm not sure if the rest of the park would fully support Mickey in that capacity. It's an interesting thought, and I certainly give you credit for it.
For Tower of Terror, if the Twilight Zone IP is dropped, why not use the existing Twilight Zone movie and use that story? It's basically the same story, but without Rod Serling and the Twilight Zone theming.
The bar idea came up in the very early summer, right around the time they were thinking of converting both towers, if I have my timeline correct. This would explain why it was scrapped.
Whatever the case, I am hoping Marni and the others are right and that Tower of Terror will be waiting for me the first week of June. (Seriously, I'd reschedule my trip to earlier if it were to close). I'm going to ride it more than my usual three times just in case, and I'm already earmarking a lot of money for souvenirs.
Tower of Terror has been my favorite ride since I was eight years old and has been my absolute favorite spot at Disney.