For the first time in years, I could say that Nintendo has done something right that everyone would be happy for once!
Release date: 28th September (Wednesday)
Renamed as: The Legend Of Zelda: Four Swords Anniversary Edition
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Nintendo has also confirmed that you'll be able to play the game in single-player mode for the first time, meaning every Billy No-Mates (or Johnny No-Mates-Around-At-The-Moment) will still be able to play.
In this new single-player mode you'll be joined by a CPU Link acting as a second player, and you'll be able to switch between the Links with the L and R buttons.
Finally, and perhaps most interestingly, this fancy new Anniversary Edition contains two brand new exclusive areas, each containing three levels. First there's the Hero's Trial area, which contains elements from other areas and will teach Link the Hurricane Spin if you manage to get through.
The other new area is Realm Of Memories, which is said to feature famous locations from other Zelda games. Make it through this potentially awesome new area and you'll get the Master Sword.
My only guess is that, you get the sword beam powerup by obtaining the Master Sword or the very unlikely, you get it as soon as you start the game (NES Zelda 1/2)
Source:
http://www.officialnintendomagazine.co.uk/30376/zelda-four-swords-release-date-details/