Aside of the usual content, this magazine is bundled with erasers of Rarity and Applejack. From the photos it looks like the bodies have been slightly altered to more look like the dynamic look of Reboot Series brushables. The faces look sub-par, but we got to give them credit for combining two 3D ponies with the magazine at all.
Next up for the UK magazine will be princess keyrings, but it's unclear if you will receive one or all three with the purchase of your magazine.
Thanks to Twitter Shy for the info!