Thread:Gokyr586/@comment-24661512-20171201181720

Do that KR 4 concept still counted as an unused rider but without identity?

Seems that the two sentences were added by different person. But I want to ask that is that mean the first KR 4 concept was raised when KR 3 concept was introduced in original Kamen Rider, then, judging from the edit in the above link, another "Kazuya Taki as KR 4" concept raised in V3? 