Anyone else notice how Zeref and Acnologia somewhat parallel Lucia and Endless? (well ofc ppl have the basic similarity is obvious) There is the evil guy and the big "unbeatable" monster, thogh Zeref looks a bit more complex than Lucia and not just pure evil like Lucia (though even he said it was up to Haru at the end). And if it is so than Zeref might acquire Acnologias power and the final battle will be between him and Natsu and Lucy. Haru and Elie won because Elie had etherion so I think Lucy is gonna get something good probably to do with her Mother and the Spirit King. Also Haru was the rave master and that was created to destroy the dark bring and Natsu is a dragon slayer and that is designed to kill Acnologia and it seems he is also destined to fight Zeref (like Glory v Raregroove) ... However there was only 1 rave master but there are 7 dragon slayers, however there is a reason Zeref is only mentioning Natsu. Maybe Natsu won't be the one to finish off acnologia at the end, like Haru defeated Lucia he will defeat Zeref and Lucy, like Elie defeated the Endless, will defeat Acnologia. The thing about Lucy might as well do with dragons since Layla died in 777 ... And well ... Acnologia is a dragon. Lucy might have to do with the 1 magic like Elie had etherion and while in rave they were going on about time the whole time so Etherion was about TIME, in FT they go on about feelings all the time so the 1 magic could have to do with FEELINGS (Lucy even said her mom mentioned something like that once) ... So it might turn out at the end that the friedship powerups make sense.
It's obviosly not gonna be the same as the ending to RM but Hiro might just pull something out of it, so why not speculate maybe some of it will even turn out to be true.