Re: Titan, Blizzard just announced that they're rebooting the entire concept and that it's delayed until 2015 or 2016, at least. They pulled most of the developers off the project to work on something else. So... I wouldn't hold your breath.
Personally, I think that the MMO field is fracturing, and will continue to do so, so we're not likely to see "the next big MMO" that monopolizes the genre. And that's a good thing. I think subscription based is going away too. Some will say that quality may suffer if a company isn't making billions off of creating a crack-like product that entices people to keep coming back each month. Guild Wars 2, LoTRO, NW, etc has proven that to be a false statement by providing quality (and updated) content, good character creation, and their own uniqueness to the genre.
The subscription was exactly what turned me off to WoW - feeling like I was obligated to play 2x a week because I needed to get my money's worth, and feeling that if I didn't invest enough time and energy into it, I was wasting my time because I'd never get the gear necessary to be included in raids, etc. As much as they wanted to make the game more casual friendly, it still requires a massive amount of commitment in order to participate in end-game content. I'd much rather play a Buy-to-play like GW2 or a free-to-play like LoTRO or NW. I've heard A Secret World is really good, and I'd love to try out Star Trek Online, just because I'm a trekkie.
Micro transactions get a bad rep, but if a game is done right you should be able to enjoy the game and excel at it without them if you have patience; otherwise, spend a small amount of money and buy in-game currency to save time. At least with micro transactions you feel like you're actually buying something, instead of paying just to play the game. It's like the difference between having your income taxed vs a consumption tax - one takes your money regardless, the other only takes it when you actively engage in commerce, and you can tangibly see what you're buying.
It's cliche to call for the end of WoW - their subscription base is still huge compared to the competitors, and their content IS massive (of course they've had nearly 10 years to build it to where it's at) but at the same time it's shrinking compared to back when it had practically no competition (at least, no quality competition.) As more good MMOs are made, they will siphon off the WoW players (and even more likely, attract new MMO players that otherwise would have had nothing BUT WoW to play 3-4 years ago.)
Eventually they'll go free-to-play (and/or buy-to-play) just to stay competitive and to stop the slow bleed of users. There will always be WoW players who feel that they've invested years of time and money into the game, and that alone makes it difficult to abandon that world, but if Blizzard doesn't adapt to the new MMO world order, they'll end up with a subscription base of hardcore-only players that reminisce about the "good old days when dungeons were hard and you had to run everywhere until level 60."
TL;DR: Titan is in cryostasis; quality free/buy-to-play games are leeching subscribers from WoW and represent the future of the MMO landscape.