AS3: Is it good to learn AS3 for Flash 9 through Flex 2?

Hey Sen,

Would be of amjor benifit to learn the AS3 structure by way of Flex for the next verison of Flash? What I mean is, will Flash 9's AS  be AS3 such as it is in Flex... and if so, would it be wise for me to familiarize myself with Flex's way of coding for that very reason?