Marvel's Luke Cage: 44 Easter Eggs You Probably Missed
40. Justin Hammer
The deal that goes sour in the first episode includes wares bought from Justin Hammer's Hammer Industries. Clearly, he's still around in the MCU, even though he was thrown in prison.
Reva also vaguely references Justin Hammer again in Episode 4, shaking off the ghost story that there are "millionaires hidden in dungeons" at Seagate.
Hammer is responsible for developing the Judas metal used to make the bullets that can penetrate Luke Cage. The metal was found after The Incident, suggesting it's Chitauri in origin, which makes you wonder why they weren't using it when they invaded...
And his tech pops up at the end as well.