I don't think it will be very popular, for the following reasons;
- WOTLK (LVL 80) has been the worst expansion since BC and a lot of great players left the game shortly after S5 and a lot of those were trying out Warhammer, which failed.
- Have a look at Blizzard's (ATVI : Stock Exchange code) share price, and you'll notice the massive decline a few months after WOTLK was released...You can not deny the proof of what raw numbers provide
...
I'll even give you a link -
Activision Blizzard, Inc Share Price | ATVI - Yahoo! Finance UK (Go to the left and click on basic chart)
- PVE content was no where near as exclusive as lets say 60 or 70 content was in comparison. Meaning; not everyone @ level 60 was able to step foot in naxxrammas (during Vanilla WoW). Not everyone was able to complete Sunwell pre/post nerf (During BC).
- When I was level 70 (On Blackrock which is a damn good progression based server), I don't think I saw any raids PUG, AND complete Sunwell, unless the top PVE guild on the server was selling loot etc.
- The exclusiveness of PVE content in general since WOTLK was released has been downgraded, so basically we have 6K GS PVE heroes who never raided pre-wrath, (Or even pre Ulduar) though are yet able PUG 25man LK raids and a lot of the time, earn their Kingslayers...
If WOTLK was harder (in general), and the content was harder (meaning less players gaining access to the content), then I can see why people would want to twink @ 80 and have fun.
Aside from all the above points as to why I didn't like WOTLK; I quite enjoyed Season 6 and the Ulduar patch. Ulduar is my favourite raid in WOTLK, and probably the only raid I enjoyed this expansion.
Moving forward; WOTLK players will be the ones QQing about how hard Cata is going to be & how hard it is to kill 1 mob duriing levelling, whilst old school players will be cheering