[Suzu]

While the blog entry does say he will appear in a Kamen Rider movie in April (which is probably a new Kamen Rider/ Super Hero Taisen, I guess), the phrase about "his new transformation" doesn't mean he'll get a new form. I'd rather say he's referring to the fact that it will be a fresh new transformation sequence. Which is only logical because it will be the 2014 Minami Koutarou who transforms and not the young Koutaro from the original series.