Madden NFL 11 on Wii has no "Delete Franchise" button. EA omitted it—likely due to Wii's limited internal storage (512 MB) and the franchise mode's heavy save footprint. Here's how to manage.
Just start a new franchise. The Wii Madden 11 franchise mode is shallow (no owner mode, limited offseason). A fresh start takes 5 minutes. If you're desperate to free blocks: delete the entire Madden 11 save via System Menu (after backup). You'll lose rosters/settings too.
No clean "delete one franchise" exists. Don't risk corruption for a mode that's not that deep.