User blog comment:Happy2147/I think Zeref is ....../@comment-24247034-20141105005500

Here's what Mashima's options are:

1. Take the boring/obvious route and have E.N.D be Natsu.

2. Take the satisfying route and have E.N.D be a new character.

3. Take the troll route and have E.N.D be another Fairy Tail wizard, wizard from another major guild, or one of the 10 Wizard Saints.

4. Take the Mega-Troll route and have E.N.D not even appear.

5. Have E.N.D kill every body in the series.