At-St (including At-St Driver) will be coming in October and will be a Wal Mart Exclusive and retail around 35-45 dollors. The Snow Speeder is coming next year along next year. Their will be three new vechiles that I know of so far. 2nd is the swamp speeder. Hope this helps.
I wish I could but it would probly cost me and family my job. I post alot on Rebelscum, when I get info it usually take about 18 to 24 months for it to come to. Sometimes products get dropped. If you like to know more check out the Rebelscum rumors thread.
Hasbro are seriously looking at it now. When (hopefully at the end of 2010) this does make a return; it will be at standard retail price. All including the prequal will be in the black and silver format.