Read the Essential Ant-Man. Man, that was like the one character in the early days of the Silver Age Marvel characters who had NOTHING that made him interesting. Really thrown together. Most of the villains are Scooby Doo-ish, though in many cases, it's like pulling off the monster mask and finding an alien. Plus, there's the uncomfortable gender role stuff.
Also read Nemo: Heart of Ice, a League of Extraordinary Gentlemen spin-off with Nemo's daughter. A fairly fun story that works in the Mountains of Madness, but this one isn't as good as the other League books, in that I feel that there's not a lot to grab onto in terms of characters and that despite the dark ending, it feels fairly insubstantial in the end. Still, fun if you want more adventures in the League universe (I'd rather they'd just flesh out the adventures referenced in the Black Dossier).