Sunrise confirms on the new Gundam Wing project shown in this month's Gundam Ace to be a new serialized novel by Sumisawa Katsuyuki (隅沢克之). It's going to be a new development after the TV series was aired 15 years ago.
The report also explicitly mentioned that new plamo kits from the novel may be released in the future. ^^
The content of the novel will be disclosed in future issue of Gundam Ace.
Information and images are from Sunrise. Second image is from this previous posting.