Merge all these Arcadia threads into a mega thread like you suggested with the Title: Dear Arcadia & Mr. K, Please read! in bold.
http://www.macrossworld.com/mwf/index.php?showtopic=41570&page=1
http://www.macrossworld.com/mwf/index.php?showtopic=39547&page=1
http://www.macrossworld.com/mwf/index.php?showtopic=42496&page=1
Joking aside, probably during Summer Wonderfest or next Winter Wonderfest maybe they'll drop some news. Or maybe Mr. K will do his cryptic clues on his twitter pics.