Ok... so let's post the references, Easter eggs, and shout outs we noticed!
The comic book version of Ant Man's helmet is in Hank Pym's office in 1970.
In Stan Lee's cameo, the car he's driving has a 'Nuff Said bumper sticker.
Howard the Duck can be briefly seen in the big battle at the end.
Cap's "Hail Hydra" was a nod to the infamous storyline in 2017 that tried to portray Cap as a Hydra sleeper agent.
Scott Lang's van is in storage unit 616, a reference to the multiverse designation of the mainstream Marvel comics universe.