I have not heard about the new Omnimover track, possibly new omnimovers, but not track. The new bride (constance), and the new Leota effect are both very possible. Sound is most definately of priority in this attraction. As a matter of fact, they've already started to fix the sound, 3 doombuggies at a time, until it's done or the rehab starts, whichever comes first. All audio that is not fed to the vechiles probally won't be fixed until the rehab time period.
Just throwing this out there...
My information concerning the replacement of the omnimover track comes from a long-time Mansion CM whom I trust very much (as I did my CP at the Mansion.) Therefore, I have no reason to doubt what she said. I guess only time will tell...