An e-mail from Beyond Home Entertainment gave me the following release dates:
Pokemon Hoenn Region Collection Hardcover Book Set (Limited Edition) - 10/10/2012
Pokemon Indigo League: S1 Collection 1 – 1/11/2012
Pokemon Indigo League: S1 Collection 2 - 1/11/2012
Pokemon: Black & White Complete Collection - 3/12/2012
Pokemon Sinnoh Region Collection - 3/12/2012
Pokemon Rival Destinies Collection 1 - 6/02/2013
Pokemon the Movie: Kyurem vs. The Sword of Justice - 6/03/2013
Pokemon Adventures on the Orange Islands: Collection 1 - 03-Apr-13
Pokemon Adventures on the Orange Islands: Collection 2 - 03-Apr-13
Pokemon The Johto Journeys: Collection 1 - 03-Apr-13
Pokemon The Johto Journeys: Collection 2 - 03-Apr-13
Pokemon Johto League Champions: Collection 1 - 03-Apr-13
Pokemon Johto League Champions: Collection 2 - 03-Apr-13
Pokemon Master Quest: Collection 1 - 03-Apr-13
Pokemon Master Quest: Collection 2 -03-Apr-13
I'm debating on whether to get the black and white complete collection since I really like my collection 1 and 2 sets. I made these really nice episode lists inserts aswell.=P
I'll be definitely be getting the giant sinnoh set mainly because it's my favourite region and I wanted my 2 favourite regions in giant sets. I already have kanto which is my other favourite.
Looking forwards to rival destinies and the new movie.=3
Now why are they releasing all the seasons again in collections?

Guess they're really milking it for all it's worth now. It'll probably be good for parents who don't want to pay for the full boxsets.