yeah Please, don't let Natsu win this fight via "I'll defeat you for my nakama!" steroid. Or "I'll use 1 year share of magic to defeat you!".
Haha thats why I was saying month ago when we got that 3 chapter special , Mashima could fuck this up or lean it towards some good storytelling if he doesn't choose the plotslayer path. Defeat is like the only good way to go, depending on how he unravels Zeref the rest of the story might get real interesting or we will always just know every arc oh FT triumphed! Erza used her Gundam Armor, Natsu ate a Nuclear atom bomb, Gray learn the Ice Age spell out of no where, Lucy was closer to being naked. The enemy underestimated this farfetched surprise!