Worgens will be cured. Undead will reunite and move to Northrend and wait for being a threat in new RTS or WoW2. Draenei will leave. Most of already known characters will became old and train new ones or die. Sargeras will go for us in new RTS and then WoW2 will begin :P.
Still got Azshara expansion + minor BL invasion with another world revamp + maybe something underground or on elemental planes...