The Darth Knight: This time it's a Star Wars-Batman Crossover!

Check out some clever custom concepts by my friend TK-9849 of Action Figure Empire:

Vader-Man

ALF-RD

Vader-Man, ALF-RD and Rebel

Vader-Man, Knight-Wing and Rebel

Commissioner Gordon and Detective Harvey Bullock

Joker and Harley-Quinn

The Riddler

Killer Croc

Mr. Freeze

You can see more of his customs at http://www.imperialshipyards.net/