I do believe what Silve said because I have always believed
that the P5s will eventually become the P4s. The only question is when. I don't recall Silve giving an exact number on the number of members he thinks the P4s will have, so it is possible he thinks they may only stop at 16 members. Now if the conferences decide to go to 18, 20, or even 24 members, then it will be interesting to see how concern the presidents are about player safety vs. the amount of extra revenue available to the schools if they increase the number of games to the overall schedule.
Then again whatever plan the conferences are working on now could be thrown a giant curve ball if the federal government decides to intervene and the athletic departments are forced to spin off into their own private (professional?) entity. Even though most people think that the federal government has no incentive to intervene, I am not sure anyone has any idea what the fallout could be if the tax codes were changed so colleges and universities (especially public) could no longer claim not-for-profit status.