the more i think about it, the less i think it'll be on ds. a gunstar heroes sequel is something masato maegawa has been talking about doing for some time. he's wanted to get the original staff together for it, who would normally be dispersed across a number of projects. so i don't think they'd even do a gunstar heroes sequel if it had to be some half-assed zero budget ds game. it's at least as important to treasure as it is to their fans.
a digression: the last worthwhile 2d shooter exclusive to or best realized on a nintendo console was r type III. twelve years ago. contrast this to the dozens on playstation and playstation 2. even the tiny subset that slipped by scea and was released domestically is enough to outweigh the combined shooter catalogues of the n64, the gamecube, and all of nintendo's portables. 2d fandom is balkanized. i don't care about 2d mario or 2d rpgs or 2d hentai dating games. whatever nintendo's "support of 2d" entails, they haven't done anything for me.
edit: i want it on a console too.