Yeah, regardless of what they decide to name it, this is going to be the phone we expected to be called the SGS3. There'd be no reason for the secrecy and the extravagant launch date if otherwise.
Who cares if they decide to tweak the name a bit as long as its still the same phone? And frankly, just because it says "The Next Galaxy" doesn't 100% mean the name will be changed at all.
Just my thoughts
"If you have an apple and I have an apple and we exchange these apples, then you and I still each have one apple, but if you have an idea and I have an idea and we exchange these ideas, then each of us will have two ideas."