Spin-Off Series

The Lego Batman Youtube Series has inspired three spin-off shows, known as The Super-Man Lego Series, The Indiana Jones Lego Series, and The Lego Star Wars Series also created and written by ForrestFire101. The Super-Man Lego Series has so far produced two episodes, and after the second one the series went on hiatus. The Indiana Jones Lego Series consists of five episodes, with the last one airing in 2011.

Episodes of the Lego Superman Series
There are two episodes of this spin-off series. They are:

The Lego Super-Man Theme Song: A lego reproduction of the famous Superman theme song. It premiered on March 12, 2010.

Lex Luthor's Weakness: The first episode of the Lego Superman series that reveals the lego Lex Luthor's one true weakness: being called a "dick-head." Lex Luthor has also been called a "penius head" by Bane. It premiered on January 25, 2009, but it's called the second episode of the Lego Batman Series.

Episodes of the Lego Indiana Jones Series
There are five episodes of this spin-off series. They are:

An Average Day: An average day of Indiana Jones' life: losing an arm and getting 1.50 on a treasure item. You can see Alfred in this episode and the 1.50 gag is repeated in the Lego Batman and Indiana Jones Movie 1. It premiered on February 18, 2008.

Mutt Williams: After Indy's partner Short Round gets killed Indy calls-up his son to become his sidekick. However, he dies too. The episode premiered on May 22, 2008

Short Round Gets Replaced: Indy tells his cloned sidekick Short Round that he is being replaced by his son. Short Round gets upset and runs into the street, where he is run-over by two trucks. It premiered on Februaury 26, 2009.

What Ever Happened to Willie Scott: Indy finally kills his girlfriend after he gets fed up with her constintly asking things. The episode premiered on November 15, 2009.

The DNA Results: Martha reveals to Indy that Mutt is not his son, so he leaves with Short Round cheerfully. The episode premiered on February 1, 2011.

Episodes of the Lego Star Wars Series
There are eight episodes of this spin-off series. They are:

Vader's Intervention: Grand Moff Tarkan tries to get Vader to stop killing people, but reaches unsuccess. The episode premiered on February 11, 2008.

Order 66: Two stormtroopers debate about what Order 66 really was after a stormtrooper killed Darth Vader. The episode premired on October 5, 2008.

Killing Darth Vader: Two stormtroopers kill Darth Vader, but fail to make it look like an accident. The episode premeired on November 17, 2008.

Vader's Personal Day: Vaders own personal day turns into the worst day he ever had! The episode premiered on December 6, 2008.

The Emperor's Grocery List: The Emperor gets Vadar to do his grocery shopping and makes notes of many unnessicary things. The episode premiered on December 11, 2008

Black-Mailing Vader: When one stormtroopers tells another that he will blackmail Vader, the other one misunderstands him and shoots Vader in the back. The episode premiered on August 20, 2009.

Hoth Hotel: After Solo forces Luke into the tantuan's rib-cage, he stays at the warmth and safeness of the Hoth Hotel. The episode premiered on January 25, 2010.

Darth Vader's Birthday: Vader kills a soldier after he insults him at his own birthday. The episode premiered on January 7, 2011.

Trivia

 * The Super-Man Lego Series and the Batman Lego Series have had plenty of crossovers, with the latest one being the Lego Batman, Spider-Man, and Super-Man Movie.
 * Interestingly, there is no Lego Spider-man Series, despite Spider-Man appearing quite alot in the series.