Professor Milo is a brilliant scientist who has offered his assistance to your gang and has a particular interest in upgrading Super Villain's abilities.
After breaking The Riddler out of prison and returning to your hideout, Milo appears offering his services, although you must purchase & build a lab at your hideout first. Once the lab is built, Milo can upgrade Super Villain's abilities after they've levelled up. Improving on your lab will allow Milo to create more new abilities for Super Villains to use. He'll even invent gadgets to better assist your Super Villains and henchmen in battle.