For fans of Transformers united I have spoken to 4 seperate stores here in Hong Kong and they have said that there are new ones on the way in June and July
They didnt know exactly which would be released but they are told there will be 2 different assortments UN-23,24,25,26 on order from March (release in June) and UN-27,28,29,30 also on order from march (release in July).
These toys have been exceptionally popular in Hong Kong with almost all stores sold out of stock.
When I asked further, they also mentioned it may go to beyond that due to its popularity and will follow US generations/RTS lines.

Will get more details this weekend when I speak to more people about it