While checking out the UK Toys'R'Us website after my recent purchase of Universe Classics Prowl, I found the twin pack that has been in the news. Turns out that it is not just a Rachet and Bumblebee pack, there are at least two! The other packs are unknown as there are no options to choose from, but so far it looks like the figures included only go up to Wave 2.
Source-UniverseTF Exclusive