Yesterday we saw the first set of the MLP Crossover Collection, being the Cutie Marks & Dragons Set. But Amazon UK has just listed the Ghostbusters one: Plasmane. In comparison to the DnD one this one only includes one pony in the classic Ghostbusters gear. The pony themself is based on G1, probably because most toylines part of the crossover collection were really popular in the 80s/90s. Also, she reminds me a lot of G3 Applejack. Must be the color-scheme...
It's currently listed on Amazon UK for £19.36 but currently out of stock. No release date is known atm as well. Have the listing and other info below! (Update: Amazon.com listing is also available, though not yet available for order)

The description also mentions there will also be a Power Rangers and Transformers set, like we posted about some days ago. But with the Dungeons and Dragons set from yesterday the question is if we'll perhaps see much more crossovers as well... Which crossover(s) do you want to see? I would love a JEM one to be honest.