When Jennifer Walters walks into the bar after her first "hulk-out," there's a QR code in a poster on the wall. If scanned, this and follow the link directs to a webpage showing the first She-Hulk comic, "The Savage She-Hulk" from February 1980.
After Jennifer finished practicing her closing statement in the opening scene, Nikki tells her that she just needs to top it off with a "savage Jen Walters look." When the character was first introduced in the comics in 1980, she was referred to as "The Savage She-Hulk."
The jury box is shown to contain 14 jurors, 12 members, and 2 alternates, as often happens in real life.
Before Jen enters the bar there is a Roxxon gas station. Roxxon was one of the early funders of S.H.I.E.L.D. and has a long history in the Marvel universe.
When Hulk/Bruce punches Jen/She-Hulk off the cliff, it is virtually identical to how Hulk punches Thor off the crashed Chitauri troop transport in The Avengers.