You could also follow the anime route and have a cast of important characters who will fight the big bad only to be defeated and need to be saved my MC in the end.
Like Goku in the Vegeta saga. Or Goku in the Frieza saga. Or even Goku in... you get it already. A more recent and clear example would be One Punch Man.
Here's a couple videos on One Punch plus one video on Chosen ones because I see the idea of prophecy cropping up once in a while in novels with OP MCs.
Super, Human Heroes (One Punch Man & Mob Psycho 100) – Mother's Basement
The Philosophy of ONE PUNCH MAN – Wisecrack Edition
CHOSEN ONES - Terrible Writing Advice