Well, the only thing we do know is that we don't know, and it's a good bet that the powers that be don't know either. From the UK perspective EASA is a big change in that as it's EU law it supercedes national laws. This doesn't give any wiggle room for national differences - such as retaining expired type ratings in a licence. If a non EU state (or even an ex EU state - we can but live in hope) is signed up to EASA, the primacy of EU law and regulation no longer applies. I appreciate that not all JAR contracting states were EU members but isn't EASA a thing of the EU?
Working in the gulf I do see that my local CAA has cut and pasted the JAR manuals and is to all intents and purposes JAR compliant. I guess the same will happen with the EASA stuff in due course.