Loved “Iron Man” and can’t wait for “Iron Man 2?” Well, we have a date: April 30, 2010. Marvel Studios, which financed, developed and produced the weekend blockbuster ($104.2 million) starring Robert Downey Jr., wasted no time in announcing a slate of future superhero films. Following “Iron Man 2,” will be “Thor” (June, 2010), “Captain America” (May, 2011), “The Avengers” (July, 2011) and “Ant-Man” (TBA). That’s in addition to “The Incredible Hulk” (June 13), “Punisher: War Zone” (December) and “X-Men Origins: Wolverine” (May, 2009).