IDW have been pimping out Transformers to just about every franchise they can get their hands on for their crossover comics, so it is not surprising that they would eventually get around to MLP, despite teasing us with the idea since 2013 with a number of variant comic covers...





Let's see, crossovers by IDW so far - Avengers, Mars Attack, GIJoe, Ghostbusters, Star Trek, and then there are indirect crossovers, like the Infestation crossover (which had TMNT, but they didn't meet up), and the Revolutions crossover (which had a small interaction with MASK, ROM, Action Man and Micronauts).