MC receives the prophecy instead of the medicine cats.

* The MC is the MC, of course they must be closely tied to the plot. But I feel like the only issue comed when the medicine cat has nothing to do, especially regarding to connection with StarClan. You could even change things around - have other Clanmates receive prophecies. A best friend that confides in the MC, a villain that lets the prophecy fuel their motivations, a leader receiving a prophecy about their death and becoming paranoid.