Only if it doesn't meet some undisclosed sales target relating to the VZW/Vodafone exclusivity agreement. (I don't know if it relates to the worldwide sales through VZW and VOD, or if it's on a country-by-country basis.)
An unlocked Vodafone Storm 9500 should work on the at&t network, though, but you'd have to buy it overseas- it seems like Canada will be getting this on CDMA as well (with both Bell and Telus since there's no Canadian Vodafone affiliate)