The latest and greatest Tumblr is called 'Versus/Hearts' and was made by blogger Dan Matutina (aka Twistedfork). Matutina had the clever idea of combining rivals from pop culture and putting them into a heart shape.

Inspired by the idea that "rivals can’t exist without each other," Matutina decided to make a series of pictures that captured this idea. Without The Joker, there would be no Batman; without White Spy, there would be no Black Spy.

If you have a suggestion of two rivals you would to see Matutina make into a heart, visit his blog and send him a message. This project is still going on and Matutina will continue to create these loving illustrations.