The casting for Giselle and The Winter's Tale has just been posted on the ROH website:
http://www.roh.org.uk/productions/giselle-by-peter-wright
http://www.roh.org.uk/productions/the-winters-tale-by-christopher-wheeldon
Edit: Age of Anxiety casting now added.
http://www.roh.org.uk/mixed-programmes/new-wayne-mcgregor-the-age-of-anxiety-new-christopher-wheeldon
It will probable be some time before we know the casting of the new works.