Followup: If the Ottomans really were strong enough to do this, do we know of any details of military plans the Ottoman military might have had to take on this monumental task?

For example, did they plan to campaign up the Peninsula from their occupation in Otranto at the time of Mehmed's death, or did they plan to invade another part of the Italian coastline and attack from there?

Followup: Why did'nt Ottomans carry on Mehmed's foreign policies after him? Also, Mehmed was usually refer to himself as Roman Emperor, Caesar. However we don't see any other Sultan claim this title even though they have the power, for example Suleiman the Magnificent, great grandson of the man himself.