Using Iron Man villain Ghost seems like a random choice at first but then I thought about it and realized it could open some interesting storylines. Ghost is a anticapitalist hacker/corporate saboteur type and could of hero worshipped Lang because he robin hooded his former corrupt corporate bosses.
Ghost could take it too far and try to destroy major corporate and finical institutions which brings her into conflict with Ant-Man and Wasp. I guess the FBI come into it as Ghost is on their radar.
Goggins is playing Sonny Burch, the chairman of Cross Technologies
http://marvel.wikia.com/wiki/Sonny_Burch_(Earth-616)