Expansion after MoP could either be an underwater-based expansion (Kul Tiras, Zandalari Isle etc.) with Azshara as end boss
we could have 2 Argus expansions, with the 1st expansion posing with Kil'Jaeden as end boss and 2nd posing with Sargeras or move on to titans homeworld.
Tell me what you think, any of these or anything else that I havn't mentioned perhaps? Share your opinions! I'm feeling like MoP was a expansion to ''cool down'' the major boss story but honestly, having a major end boss that poses threat and is very involved with the story line of quests during the expansions zones is great, that's what made WotLK such a great expansion because Lich King was involved in almost every zone!