Austin's character is going to be probably one of the few points of contact with Lucas, I should advise. Think the relationship between T-Bone and Pearce in Watch Dogs, though of course, I only ever take inspiration, so it's very likely to be even completely different to that. 

As for Lucas, if the backstory does seem a little inspired from anywhere, if you threw Watch Dogs, Punisher, and half a dozen other sources of vigilantes in, you'd have Lucas.