From the pages of Dengeki Magazine, both the Earth Federation and the Titans version of the RG RX-178 have been confirmed, with both to be released on the same day. This is to be expected as they are identical other than colour and decals, but great to have confirmation.
And as a bonus, from the same magazine, BANDAI has announced they are continuing the MGF range with models of Tiger and Bunny. Due to come out around the middle of the year, these two figures will use the same style and scaling as the previous Master Grade Figurerise models, such as the Dragon Ball Z, One Piece, and Kamen Rider models that are currently available.
Once we have some good images of these models, we will post them here.