In a mini press conference, °C-ute mentioned Tsubaki : http://www.japanlife...esse-des-c-ute/
The article is in French but here's a translation of the part talking about the Factories.
In your opinion, which other Hello! Project group is most likely to follow in your steps, or shares the same spirit as you?
°C-ute : Tsubaki Factory (also known as Camellia Factory), who debuted recently, are a lot like us. Just like us, who debuted shortly after Berryz Kôbô back then, Tsubaki Factory are a bit like us, and Kobushi Factory (also known as Magnolia Factory) are a bit like Berryz Kôbô. We hope that despite their hurdles, they will keep on fighting because they are strong.
The way I understand this, it confirms what I've been thinking for a long time: Tsubaki are unofficially °C-ute's successors, while Kobushi are Berryz's successors. The last sentence is vague - could it mean that °C-ute see Tsubaki's prolonged time in KSS as similar to their own time as "the remaining Kids"? I'm curious as to whether people agree with me, or if it's just my confirmation bias speaking. =)