I think (and I maybe wrong) that the Sovereign may be in dry dock for awhile. When we were on her back in Aug we made friends with quite a few of the staff...I know their next time off was when they would be going home for Christmas (now) and said they wouldn't be returning for awhile after that...I just can't remember the time frame though.
Carnival Holiday (1999 ?)
RCI Sovereign of the Seas 2007
RCI Enchantment of the Seas 2009