Dark Kabuto - January 31st release, 2,625 Yen (inclusive of tax).
Urataros Imagin - January 31st release, 2,625 Yen (inclusive of tax).
Didn't mention whether that tea cup is included XD
Momotaros Imagin - Late February release, 2,625 Yen (inclusive of tax).
Momotaros Imagin DX Set - Momotaros and the table & chair set. Late February release, 3,675 Yen (inclusive of tax).
Kamen Rider Kuuga Mighty Form - Late March release, 2,625 Yen (inclusive of tax).
Kamen Rider Kuuga Titan Form - Late March release, 2,625 Yen (inclusive of tax).
Images from Tamashii Web.
The next two S.H. Figuarts Kamen Riders after Kuuga Titan Form will be Kuuga Dragon Form and Pegasus Form. 14cm tall each, both are scheduled for late April release, 2,625 Yen each inclusive of tax).
Images are from Amiami: Kuuga Dragon Form and Pegasus Form.
Still on S.H. Figuarts Kamen Rider, but a limited merchandise this time:
Tamashii Web Shop Limited S.H. Figuarts Kamen Rider Yu-ki (仮面ライダー幽汽) - The protagonist Kamen Rider in "Farewell, Kamen Rider Den-O: Final Countdown". Comes with part to change between his "Skull Form" and "Hijack Form". Pre-order has started since January 23rd, and will end on March 16th.
Release date is May. 3,885 Yen (inclusive of tax).
Info and images from Tamashii Web Shop, GA Graphic.
On the other hand, Tamashii Web has added a new page introducing the latest product series for Kamen Rider: Twist Action Form.
Much sophisticated than your own DIY version of course, but the theory is all the same.
Using wire as the inner frame to allow almost unlimited articulation.
More images are also up for the first two releases from this new series:
Den-O Sword Form - Late January release, 4,410 Yen (inclusive of tax).
Kuuga Mighty Form - Late January release, 4,410 Yen (inclusive of tax).
Images from Tamashii Web.
The next Twist Action Form figure after the two above will be Ryuki - Late March release, 4,410 Yen (inclusive of tax):
Images from Bigbe.
Also, from the latest issue of Figure-Oh, Project BM! Kiva is coming soon:
A few scans on the first two releases from the newest Kamen Rider Decade series:
FFR00 Kamen Rider Decade - March release, 2,415 Yen (inclusive of tax).
FFR01 Kamen Rider Kuuga - February release, 2,625 Yen (inclusive of tax). The item numbering is after Decade, but the release date is before him.
Magazine scans are from CyberGundam: Kiva, Decade.