On its invite Samsung has said :-
COME AND MEET THE NEXT GALAXY
The Korean company might launch this phone at London on 3rd May 2012. This phone might feature an 4.7 inch touch screen with full HD display, an 8 MP HD camera at the back and 2 MP camera at front for HD video calling.
It will be packed with 4G/LTE, Android 4.0, aka Ice Cream Sandwich, Samsungs own Exynos 4412, 1.5 GHz quad-core processor. The event will start on 2 PM local time, you can track the live happening of event by streaming it on www.facebook.com/samsungmobile.