I have also brought forth some other sources (that we have already seen here on Faeit 212),since multiple sources have not mentioned Chaos Daemons in our near future.
Please remember that these are still rumors, so always take them with a grain of salt. The rumor mill is in full swing right now, and it is hard to sort out everything on the horizon.
Rumored Daemon wave: August or September
Plague bearers (5x box) Plastic. Priced as pink horrors
Furies (5x box) plastic. Priced as de scourges
Blue scribes (finecast)
Herald of nurgle (finecast)
Maybe a little surprise here too...
Plastic GDs are done, rumored to have pieces to build named GD as variants ( though not expected til 2013)
Here are some of the previous rumors, so that we can see them all in one place.
August is Daemons wave (plastic troops, last two boxes)
Apart from CSM, no more codexes/Armybooks this year
I've heard talk about this wave possibly including something new... which presumably would have rules in WD ( or online ?) or somesuch.
A previous rumor via Stickmonkey
Hearing bits that aside from Plague Bearers, there may be new furies in the works. As well as seeing karanak and hounds of khorne moved to finecast soon.