is Splatoon receiving more attention because its an exclusive Nintnedo shooter?

[AlphaCielago]

This game will be big, that's why it's getting the attention. It probably had one of the bigger spaces for itself at E3. Any game with the space it was occupying would garner quite the attention and Nintendo is just the tip of the iceberg.
I think I read somewhere that Nintendo wants this game to penetrate the shooter market, like Mario Kart did with the racing market.