He might join, but with time, he can't manage to hold the whole community at ransom, the same way Moi's son are unnoticeable in Rift Valley. With Raila gone, Kikuyus will be more than willing to elect another presidential candidate from other regions after Ruto. Hope you know the reasons as to why they shy away from him is his supporters and the dire need to protect their property.
In Nyanza, politics of reason will reign, you must admit that there is no democracy in Nyanza, the leaders elected are not the will of the people but Raila's staunch donors, why was there resentments during nominations, the will of the people was not honoured.
So my point is, maybe after the exit of these dynasties, political wind will sweep the country.
Remember Kenyans are learning very fast, and they are basing their rights in the ballot box judging from what leaders what done for them. Let's engage soberly, you are one bright chap