In truth, my only experience with Ant-Man comes from the Ultimates, so I don't know what you're talking about.
But I remember Edgar Wright saying he was trying to use Ant-Man's shrinking powers in mroe interesting ways, because Ant-Man is often kind of just scoffed at as silly, so he was going to write it as kind of a spy-thriller type thing, using his powers for espionage. It had me interested.
Does that sound about right?
The Irredeemable Ant-Man was a SHIELD agent under Nick Fury, was later a member of Norman Osborn's black ops hit squad, and is currently with Captain America's personal team of espionage Avengers. So...yes.
Ant-Man is the Aquaman of the Marvel universe. A movie would be so incredibly lame.
Aquaman is the king of a magic and weird technology using fantasy kingdom. He can breathe underwater, swim at 1oK Feet Per Second, is impervious to everything up to and including machine gun fire, has superhuman strength, and can summon an army of sharks and giant squids to wreck your boat and eat the survivors. He fights high tech pirates, ancient sea demons, his evil sorcerer brother, his evil rebel army-leading sister-in-law, and at least one humanoid shark. His "family" includes his wife (who has all his abilities save for communication with sea life, instead able to create solid water constructs), a sorcerer whose most basic ability is control over water (including boiling it, spouting it at you, freezing it, and vortexes), the son of pirate nemesis (who has the solid water powers and electric eel abilities), and a bad-ass mercenary genetically altered to be live underwater.
Aquaman isn't fucking lame. Super Friends is fucking lame.
That said, I think the recent "Wasp" incarnation of Hank Pym would make the best movie version. Call him Yellowjacket (to leave the Wasp name free), but the "lightning gun wielding science adventurer who happens to be able to shrink and sprout wings" is just win. Laboratory housed in a parallel dimension, Pocket Tool that keeps an entire lab of Reed Richards-level equipment shrunken in his pocket, awesome leather-labcoat costume, cool goggles, and a fucking lightning gun. One of the few things about Dark Reign I was sad to see go.