1. The Witcher 3
2. Project Cars
3. Galactic Civilizations III

I am looking for only one game. Since OP asked 3; I will post two others. Here it is.
1. Witcher 3 PS4
2. USF IV PS4
3. Project Cars PS4

1- The Witcher 3: Wild Hunt (PS4)
2- Splatoon (Wii U)
3- Devil Survivor 2: Record Breaker (3DS)

The Witcher 3: Wild Hunt (PS4)

Project CARS (PS4)

Splatoon (Wii U)

I like this one :)

I dont really understand though if this is a sales prediction? or a hype/what are you lookg most forwards too, type of 1,2,3 list?

The Witcher will be big I think, so will splatoons, and since 3DS has so large a user base, I could see Devil Survivor 2, doing fairly well too.

1. The Witcher 3: Wild Hunt
2. Splatoon
3. Project CARS

The Witcher 3 is getting a lot of hype, and it's easy to see why. Though the 8th generation consoles were all released over a year ago, they have had trouble showing their prowess compared to 7th generation hardware. Even some of the best games for the PS4 and One, like GTA5, The Last of Us, Dragon Age, and Far Cry 4, are also available on older platforms. Not only is The Witcher 3 going to be 8th gen exclusive, it seems to be a step beyond what games like Fallout 3 and Skyrim could offer. The world's size, depth, and complexity combined with more fluid mechanics and a lack of load times points to a new future for open-world games.

Splatoon is a big opportunity for Nintendo. Not only are team-based shooters something of a new territory for Nintendo, it also has the chance of giving the Wii U a new big exclusive that, like Mario Kart and Super Smash Bros, can appeal to a wide range of audiences. Splatoon is also a good sign of Nintendo's progress, suggesting that Nintendo is confident to release a game requiring a solid online infrastructure. Though the lack of voice chat and possibly limited modes are a concern, this shows promise.

Though I am not very excited for it, I admit that Project CARS seems to be offering a type of racing simulation that is not found elsewhere.

I'm looking forward to:

1. Shin Megami Tensei: Devil Survivor 2: Record Breaker (3DS)
2. Splatoon (Wii U)
3. Galactic Civilizations III (PC)

1. Splatoon
2. The Witcher
3. Wolfenstein

There's only 1 game in May. Witcher 3. Everything else is irrelevant

i cant make a top 3 list since i only care about 1 game. The Witcher 3