Well this will be a 11 pm release since its chillingo. Other devlopers will do worldwide release games though.
I dunno... it looks amazing no doubt but it looks very similar to the first. And if it's just a few new units and abilities, it doesn't seem to catch my interest since the cities practically look near identical and even the enemies =\
Someone who shall not be named has mentioned to me that while it is undoubtedly similar, it doesn't quite feel like more of the same. Not my experience though, I'll be able to confirm/deny that later.