Vito was expecting Barzini-Michael meeting to take place regardless of whether Vito was alive or not? Vito to MicIhael: Garden scene
Now listen -- whoever comes to you with this Barzini meeting -- he's the traitor Don't forget that
Certainly Vito was expecting Barzini to move against
Michael, but not
him (Vito). Barzini figured Michael was weak, and would be weaker without Vito's guidance and counsel. That's why he waited until Vito died before he made his move--and why I believe Tess didn't approach Barzini right after the fishtank scene (see above).
