User blog comment:Marco the Marine Admiral/Laxus' Battle: Another Threesome?/@comment-1454981-20121223201530/@comment-5036235-20121225053551

Not that I believe, but it's a possibility.

If Gajeel digests Etherion he could definitely beat 5 Erzas. 7 years ago Natsu was way weaker than Jellal, but he almost killed Jellal by one single punch after digesting Etherion.