My prediction (A little bit wild but :3):

-Irene:What is that girl doing?She knows that there's no way she will be able to destroy that meteorite...But still she wants to protect her people? Flashback:Irene realises her mistakes as being a queen -Erza:Forwarding to the meteorite...(20x slow motion).

Back to Jellal vs August -August:So you have some nakama power left eh? -Jellal:.... both of them see the meteor -August:Irene!!What is she?insane? -Jellal:WTF,is she copying my magic? :v

Back to Mavis and others Gildarts,rest of the FT guild and other guilds reunited.Except Mirajane and OS Everyone looks at the sky and shocks

Back to Natsu's plot -Gray realize his dumbassery... -FS finally finished... -Natsu is glowing and there's fire all around him.Temperature rises significantly... -Lucy's cloth is disappering... -Happy makes a cold jock... -But Everyone shocks...

Back to Zeref Looking at the sky,smiling and -Zeref:It is almost time.

Back to Acno -He is resting in a boat (He doesn't have motion sickness because he mastered DS magic :3) and waiting for something and looking at the sky. -Acno:That dragon (Pissed off face)...

Back to Lacrade -For some reason White stuff is all around him :P also a powerful aura coming from his body and he is subconscious...

Back to Erza -Irene finally decided to attack Erza and preparing one spell but still thinking about something... -Erza still going towards to that meteor... -All of a sudden feels some extreme pain,remembers about her broken bone,lost momentum and falling... -Irene shocked but sill confuse whether she should attack her or not...

Back to Jellal -August:Haa?What is that? -Jellal:Erza.... -Jellal:METEOR -August:WTF?...

Back to Gildarts and co -Mavis:That's a meteor.If it hits,we're gonna die... -Suddenly Jellal flies over them -Gildarts:Huh?(Noticed Erza) -Laxus:...(Noticed Erza) -Gildarts:Rushes to stop the meteor... -Laxus:Follows Gildarts footstep for some reason... -Others:Unfortunately they are not as fast as these two so they are preparing for the defense...

Back to Mirajane -She is still fighting Jackob... -_-

Back to Zeref -Zeref:August... -August:Yes!your majesty...

Back to Erza -She is still falling... -Jallal catches her... -Erza:... -Jellal:smiles -Erza:The last smile i want to see...Faints -Irene:Confused...What is that? -Gildarts:Crash magic.Destroys the meteorite... -Irene:About to release her spell... -Laxus:Red Nuke...Stops Irene from releasing the spell... -Meteorite shattered into 100 pieces and falling all over the Isgar...

Back to Mavis and others -Mavis:Casts some kind of defensive spell and protects everyone. -Gajeel and others:Injured...

Back to Oracion Seis -They are still subconscious and unable to move but luckily none of the pieces falls there...

Mirajane vs Jackob -One piece of meteorite takes down Jackob and Mirajane is safe somehow and she saw that blast and decideds to go there...

Back to Natsu -DeS Gray tries to freeze that fire but fire vaporizes his ice instantly... -Brandish:Take care of the meteor... -Lucy and Happy:Crying because Natsu is no more...

Inside of Natsu's heart -Natsu enters that place where the two seed is merging together and Zeref shows up and says he is dead... -Lucy and others feel some enormous power... -Seeds finally merged together...

Last Panel,Zeref and Acno sense some enormous power -Zeref:So,it's finally begins... -Acnologia:The Dragon king festival... -END:Opens eyes...

NEXT CHAPTER:So the War Begins...

P.S.Ignore any grammatical mistakes.IK won't happen right?But i think mangaka will do something to keep up the hype awesome since this is the last chapter of volume 60.