very unlikely. we didnt get the remake for CoM until after KH2 and by then they had already made a final mix. then again coded isnt very long and its already been started on (voice acting anyway) so who knows.
Yeah but nomura said he wanted to release one of the two mystery titles this year and if im correct Re:coded is one of the mystery titles. Also they have probably been working on it here and there already.
Seeing as to the shortness of the story and the important BBS related ending I bet that it will be released around BBS's release. They probably haven't set one yet because E3 is around the corner and it was just announced like yesterday. The rating will obviously not be set yet because ESRB would not have time to rate a game that is probably not finished.