If it's Universal Century, it will sell. No kit in the HGUC or MG UC lines has to my knowledge failed to return a profit (though some obviously far more than others). The Marasai for example sold quite well this year (as did the Banshee). The Zeon Remnants Marasai will probably get a limited web release (with Feyadeen Rifle and Sea Serpent) in afew months, or maybe a general release since it'll probably sell well enough.
SEED does pretty well too (minus the VS Astray kits I guess).