Personally i think a re-release would be better that way it would be better to organise her future tour whereas if she released a new album she would have to work out how to manage two tours/discard one
I could never see Beyoncé doing something like an EP re-release with 6-8 new songs. I mean, I could see her doing another 3 song separate EP like she did for IA...SF, but then again I only thought one of the songs on that EP was any good (Poison destroys the dull WDYLM & VP remix).
I mean, she could surprise me... but idk. The 4 era is far from over. She has yet to release End of Time, which most likely won't be released until the Springtime. Love On Top will take a while to be successful if it becomes successful eventually. She has also released a huge amount of singles & videos from the album already. It would almost be overdoing it to rerelease.
I cant see Beyonce releasing a re release. But I think she will stick with 4 for this year. Im sure she will tour with it during the later part of 2012.