I noticed that Bandai is quite slow is releasing BB and SD Gundam models now. Not quite sure about the reason, but the few BB Gundams recently are quite amazing. For example, BB Senshi Sekijishi Gundam out this month. The model itself has the ability to transform into a lion. When combined with some other previously released BB Gundams, it's able to form a greater beast. Quite a creative idea, since the SD product line doesn't have to follow strict rules or standard on scale and logical structure, or even inner mechanism as we see in all the Master Grade models. Lets hope there will more of such stuff from Bandai's cookie jar.
Pictures are from The Gundam Base Side 1.