No chance at all.
World of Warcraft still represents one of three largest franchises for Activision Blizzard and continues to be one which has a high level of players engaging with the game (from a financial standpoint).
Not all of this is from Retail - as a game they see it as the whole engagement with Classic/TBC and Retail and recognise the importance of supporting players in those areas.
Ref: (I don’t have link privileges yet but it hey talk about the top 3 money makes in the August 3rd Investor report and Candy Crush, WoW and CoD bring in the big bucks).
My idea/understanding of WoW is that it will likely be around for a long time to come still but likely have fewer Azeroth-shattering events like we have had in the past. They’ll support it as long as it brings in $.