He's not an instantly awesome sounding character at first blush. Can't fault you or anybody for that. He's a low B-lister at best, a support player to the bigger dogs most of the time when he's included. I'm thinking though that for his film they will do certain tweaks within reason like the other films that give him a sense of uniqueness and intrigue. I think that's why the 2-person concept for the Ant-Man identity is in play. That hasn't been done before.
No one really knew who Blade was either before his film. Anything is possible.
Next to a cosmic film with a talking badass raccoon and tree though Ant-Man will be much more recognizable as a concept for general audiences to latch onto.