Apparently it's been announced. March 2011.
http://www.eurogamer.net/articles/dragon-age-2-dated
http://dragonage.bioware.com/da2
Some concept art:
http://na.llnet.bioware.cdn.ea.com/u/f/eagames/bioware/dragonage2/announce/concept-01-o.jpg
http://na.llnet.bioware.cdn.ea.com/u/f/eagames/bioware/dragonage2/announce/concept-02-o.jpg
http://media1.gameinformer.com/imagefeed/featured/gameinformer/covers/dragonagecoverspread.jpg
Can't be arsed to upload to ImageShack, sorry.
http://www.eurogamer.net/articles/dragon-age-2-dated
http://dragonage.bioware.com/da2
Some concept art:
http://na.llnet.bioware.cdn.ea.com/u/f/eagames/bioware/dragonage2/announce/concept-01-o.jpg
http://na.llnet.bioware.cdn.ea.com/u/f/eagames/bioware/dragonage2/announce/concept-02-o.jpg
http://media1.gameinformer.com/imagefeed/featured/gameinformer/covers/dragonagecoverspread.jpg
Can't be arsed to upload to ImageShack, sorry.