Fezrock

Unless they really like Dishonored 2, I think its definitely gonna be Doom. Maybe a slim outside chance of Overwatch.

The Witness seems more likely headed to the honorary 10-spot reserved for "This is the big game we're supposed to like, and we did sort of like it, but we didn't love it and it didn't stick with us."

The Secret World. You won't be able to beat the dungeons, but those aren't necessary to progress, and the story actually works best if you are playing alone (which you probably would be anyway considering the current size of the player base). It has by far the best writing and plot of any MMO I've played, and better than a lot of single player RPGs too; with fully voiced cutscenes before every single story and main mission in the game.

Something to keep in mind though is that leveling is horizontal, not vertical, and that all clothing is completely cosmetic (stats come from invisible gear); so there's not much indication that you are making progress in the game (except that the story is getting more and more bonkers).