Over the past few days, multiple people have sent in pics of the new wave 5 blindbag set. This is the group with the glittery/metallic ponies (as seen above as well). It's also considered the "blue set" here in the USA, but no one has seen it here yet.
There are also mixed reports of wave 6 (or yellow) with the alicorns popping up, but these are primarily coming from Ebay. (Thanks to Whatshisgame for pointing these out)
Thanks to Kr3id for the images. Hopefully you guys find some luck in tracking them all down!