from the photos of the players in thier numbered training kit and from this link these would appear to be the squad numbers for next season, http://en.wikipedia.org/wiki/Coventry_City_F.C.
doesnt look like theres any room for a "franchise player"
Don't know whether it's just my laptop, but that link isn't watching. I have however, been watching a few interviews with AT, Harri and the lads from Portugal on Sky Blues Player. There do appear to have been a few changes, if the numbered kits they are wearing have any significance (highly probably that they may not though).
These are the changes I saw:
1 - Joe Murphy
3 - Chris Hussey
8 - Carl Baker
9 - Lukas Jutkiewicz
11 - Gary McSheffrey
21/31 - Conor Thomas