In the same video, Vader moonwalks. He was played by NicePeter, as was the adult Michael Jackson in season two.
In the rematch, Vader comments that he's "on the leader of your limp-dicked Luftwaffe" before making a reference to Lucas's other famous production, Indiana Jones. Then another Lucas production about pilots taking down the Luftwaffe came out.
In the third installment, Hitler tells Vader "I beat you twice you sellout and now you bow down to Mickey Mouse.". Now, Maker Studios, the company that produces Epic Rap Battles of History, does as well.
Even funnier now that ERB is independent of Maker.
Death Battle has made a fight of Darth Vader facing another European dictator Dr. Doom. From the looks of it, Adolf will be very happy with Doom by now.
This battle has EpicLLOYD make fun of a fictional villain's "burnt-ass face". The same happened 70 battles later in "Freddy Kruger vs Wolverine", although this time Lloyd played a fictional hero, rather than a real-life villain.
Lady Gaga makes a reference to the Jackson 5. 15 episodes later, The King of Pop himself (with a short appearance by his sibs) takes a shot at the mic. Both Gaga and Adult!MJ are played by Nice Peter to boot.
The Stinger for Season 2 has a quote from Vladimir Putin appears, saying that he will kill Nice Peter if Season 2 does not have a Russian character. The Season 2 finale has five Russian characters, one of which is Putin (played by, you guessed it, Nice Peter).
The second installment has Epic Lloyd noting that Nice Peter could be interpreted as a euphemism for the male genitalia. A year later, Peter reveals that he is expecting a baby.
They show the Tenth Doctor (aka David Tennant) regenerating into the Fourth Doctor (Tom Baker), which at the time was just representing the franchise with the most popular ones, but "The Day of the Doctor" heavily implies that the Doctor can not only go back to one of his past regenerations upon "retirement", but went with the Fourth Doctor eventually!
In his first verse, Picasso mocks Bob by telling him that even his dog, Lump, can make better paintings than him, and in the second verse, he mocks Bob's name (which is rather unimpressive compared to Picasso's Overly Long Name). The BTS video reveals that the dog who plays Lump is actually named Bob.
Trump's appearance in this video feels almost premature these days, since he ended up running for president in 2016, and it's safe to say that Trump has offered a ton of material to work with, as evident in the election-themed Hilary Clinton vs Trump battle where he seems like a totally different character.
Superman's line about "Just one punch / and over nine thousand screams" becomes more hilarious after One-Punch Man gains popularity.
Goku's line about "You got your ass beat / by a bat with no power" also becomes more hilarious after Batman v Superman: Dawn of Justice came out, and just like in the comic it's based on, Superman did get his ass beat by Batman.
Goku's line "Defeat me with heat beams, you're crazy" is either this or Harsher in Hindsight, depending on your point of view, to those who have seen the second matchup between these two characters by Death Battle, in which Superman deals the finishing blow by focussing his heat-vision through Goku's eyes to incinerate his brain.
Isaac Newton mocks Bill Nye's show by asking if his own rap would need "a bleep or a bloop or some other wacky sound effect". Some years later, Weird Al would release the "Hamilton Polka", where he basically pulls out all the stops by throwing in as many wacky sound effects as he can muster.
Newton refers to Nye as "Beaker in a bow tie". Not only did Jim Henson himself appear in a later battle, Peter gave him a similar voice to Nye!
The BTS for the season 3 finale has Peter appearing 'in a box' ie. an inset as he was out of town at the time. The BTS for the start of season 4 has Peter playing around in a box, the one the Stay Puft Marshmallow Man costume came in!
One insult towards the Ghostbusters is "come harder than Ray [Stantz] when that ghost popped his cherry". Having your cherry popped is a term for losing your virginity, but is typically applied only to females, making it a dig at Stantz's masculinity. Then Ghostbusters (2016) actually turned the titular group into girls, and suddenly the line is more applicable.
Another one concerning the new movie - the Mythbusters' first verse involves Peter and Lloyd doing a particularly complicated hand-slap-dance that took a while to practice, while in the new movie, Abby and Holtzmann have an even more complicated Secret Handshake that they pull off swimmingly.
Jack the Ripper claims that Hannibal is forgotten and that nowadays people watch Dexter. Dexter's series finale ended in September 2013 while Hannibal premiered in May 2013. At the time this rap battle premiered, Hannibal had garnered enough popularity to warrant a third season on NBC. However, before the fourth season of ERB was over, NBC had cancelled Hannibal. Maybe Jack the Ripper was right after all...
Ted says he's heard better insults from Socrates' anus. Socrates did appear two battles later in "Eastern Philosophers vs Western Philosophers", which is foreshadowed by Lloyd appearing dressed as Socrates in this video.
Lewis & Clark are played by Rhett & Link, who previously rapped alongside Smosh in "Artists vs Turtles". In the Bill & Ted films, Bill was played by Alex Winter, who would later work with Smosh himself by directing Smosh: The Movie. Kinda makes you wonder just whose side Rhett & Link are on.
Nietzsche also isn't the first serious, explosively intense German man played by NicePeter who gets a "[NAME], MOTHERFUCKER!" line in the series. Maybe Nietzsche and Beethoven are related in the ERB world?
Henson's line "the Four will always be Fantastic" was proven wrong the very same week of the battle's upload, as the Fantastic Four reboot opened a few days later and performed terribly with critics and audiences, not to mention Marvel cancelling their comic the same year this battle came out!
Walt's line "In fact I own this whole series!" made sense at the time because Maker Studios, which ERB worked with at the time to make their videos, was bought out by Disney in 2014. However, the trailer for season 6 includes "100% Independent", indicating that ERB will no longer be tied to Maker Studios and therefore Disney. "I own this whole series!"? Not anymore you don't.
Even funnier, ERB seemed to realize this. Hence why the season 6 trailer contains Stock Footage for Disney's "wholeseries" line.
Fett says that Deadpool "should have ditched the prick from Van Wilder." Shortly afterward, the Deadpool (2016) film showed that Ryan Reynolds could in fact be tremendously successful in the role once he was actually allowed to play a version faithful to the comics.
One of George R.R. Martin's first disses against Tolkien was complaining about how all of "[Tolkien's] bad guys and guys die and [his] good guys survive," is amusing when, in the wake of the ending of Game of Thrones, almost all of the main good guys live and all but two villains die.
Gordon Ramsay vs Julia Child
Ramsay compares Child to both Shrek and Big Bird. When Big Bird appeared in the "Flash in the Pan Hip Hop Conflicts" subseries, he also compared his opponent to Shrek!!!