Simplify the following text for a Grade 6 native English-speaking person.
Original: In 2010 , Dr Pepper was part of a marketing\/promotional campaign with Marvel Studios to promote the summer blockbuster Iron Man 2 ; characters from the film adorned cans of Dr Pepper , Diet Dr Pepper , and Dr Pepper Cherry .
Simplified: Dr Pepper is a soft drink ( soda ) similar to Coca Cola in its color . Each can of Dr Pepper contains 150 calories .