'Execudus' in Redmond: Top Microsoft Execs Get OutThe quotation marks of course mean that this is a self-conscious usage. There are a couple of other instances of this term used in this way (and not, as I interpret it, as something to do with World of Warcraft); all seem to refer the same phenomenon of executives leaving Microsoft specifically. Some references don't include the quotation marks. Since I don't know WoW, I don't know how likely it is that the business-terminological mashup is inspired by the game. It's certainly understandable without any previous exposure to WoW.
The cited article is from 2011; it's possible that the term was pretty new then. A blogger for the Redmond Channel Partner site more or less suggests the newness of the term at that time:
Your editor is working on a story about Microsoft's recent executive departures (now known here as the Execudus), and this week one of the biggest names in Redmond is headed out the door.I guess we'll have to see a similar exeunt from other companies before we can determine whether the word has legs.