You need to add a "none of them" option as well as Borderlands because your selection is far from being obvious...

It will maybe affect COD to a certain extend but nothing else. It will just be another option for FPS lovers (like me) but in no way it is going to replace (or hurt) Halo or COD.

Edit: Borlderland would be the most impacted imo. Actually, I personally get bored of Borderland very quickly because of the story and the graphics (cell shaded). So in my case Destiny will just replace it and I see no point of buying Borderland as the open-world / loot was the thing attracting me.

Splatoon

none

none if it doesn't improve PvP

I'm gonna go with Halo, though i really feel it's a toss up between that and COD. I don't really see it affecting Battlefield.

First of all, i don't think it will affect any of them drastically due to it being an MMO. But because it will be released before two months from COD, I think it may have a small effect on COD as it may delay it sales.

Halo. The people outside US/UK that bought xboxes for Halo aren't going to do it now that they have Destiny on PS4.
I guess it hurts the Xbox more than it hurts Halo itself though... semantics.

lol okay

all of the modern CODs, MW MW2 MW3 BO2 also took place in the future compared to there release date even though AW isn out yet most of the weapons from it and the past future CODs were relatable and believable.  you also dont know what weapons the real military has in development and are using right now

Smash Bros and COD.

COD - A lot won't be able to buy both.

Smash Bros - Some would rather get a X1/PS4 with Destiny than Smash Bros with Wii U.