Starship Battles is Missile Command in space, with improved graphics, and a weapon upgrade progression system. All that sounds pretty good. If you agree with that assessment, check out the trailer. It even has music from Two Steps From Hell in it (you know, that group whose music you hear in every advert and trailer if you own one of their albums?).
While no definitive release date is announced, it is hoping to be out before the end of May, so keep an eye on the App Store!