The official website of Shogakukan announced that the Ruby and Sapphire arc will be collected into a series of four omnibus collection called "My First Big Special". The first book will be released October 24, 2014 and the next three books will come out in the next two months. In 2011, thank to a poll, the RS arc was collected into a series of three large omnibus that would contain volumes 15-22 and the first volume came out before the Great Tohoku Earthquake and the followings volumes where not released. Source: Shogakukan - Eitaroo
Sorry for the late reply, been rather busy with working on the Fanfic Cover and all... ^^; Anyway, I wonder what kind of story would we get for the ORAS arc? :3 Will Ruby actually know anything about the Mirage Island, whatever happened to Sird, one of the former Team Rocket Admin in the FR LG Arc, and former Admin of Team Galactic... cause she somehow escaped from the Detective as well during the Diamond and Pearl arc. Will she make a surprise comeback in the ORAS arc or not?
For the Mirage Island... the authors confirmed in an interview that Ruby remembers! XD And for the arc... I hope to see again the blue/red orb!