Mittendrin statt nur dabei: Olymp. Trikot
Jersey printed on the cover which folds out. DerTOUR Photo-Competition thinkable.

Solution

(Pixels are due to low resolution images. before printing the artwork would need to get finished with high resolution images from www.veer.com)

Cover is showing a jersey with race number. Text: 'Are you going to be part of it?' (in german a play of words which also describes that you could actualy join the games). you can fold up a second layer on the cover which gives you the impression of an actual jersey. text that is shown now "I am part of it!".
When you hold it up in front of your body it looks neat. DerTOUR could run a photo competition.
I hope my english description is almost understandable.