CloudAtlas said:
There is a market sure but this big a market? Unlikely, very unlikely. Borderlands 2 sold somewhere around 9 million copies, the biggest and most subscribed to MMO ever managed a peak of 14 million subscribers and the next largest MMOs managed around the 2 million mark.
I disagree. If I had to come up with a game that's appealing to the largest possible gamer audience, I might think of something like Destiny.
Destiny has a grounded SciFi setting with some space magic and post-apocalyptic elements. Done right such a setting can be appealing to a large number of large fandoms, like Star Wars, Halo, or Mass Effect. Destiny's core gameplay is an FPS, probably the most popular of all genres. If they offer both good PvE content as well as PvP content, with small and medium scale (with vehicles) PvP, about every shooter fan can be able to do what he enjoys in Destiny. Destiny's RPG elements could draw in even more people, from the RPG crowd, and it's kinda-sorta MMO nature draw in MMO fans... which is a very popular genre itself. With, arguably, a very large untapped potential - all the people who want to play something really different from WoW but can't. Its post apocalyptic elements could draw in people who like that sort of stuff.
If you can fly around in space ships a bit, then you'll have even more. Its general art style is not truly unique, not really divisive in any way either.
Now as I said, whether Destiny will offer all that, and do so really really well, I don't know. But it could. Or at least it could have.
And easily justify a 500 mio $ investment too.