Here is a hint guys. Lumine is going to be defeated, but will still survive the battle. Right afterwards though he will have enough energy to enter the real world. Once that happens we will get Axl back and stronger than ever! Out of the X series trio (X, Zero, and Axl) Axl will be the first one to get an upgrade. The upgrade? White Axl!
White Axl:

After Lumine emerges from Axl's mind and into the real world the shard inside Axl's head will no longer have Lumine's data, but it will have Lumine's power. This will increase Axl's
Speed: Making him slightly faster, with slightly better reaction time
Stronger Armor: 50% stronger body to take slightly less damage.
Stronger Copy Ability: Axl will now have a 2 types of the Copy Ability
Perfect Copy Ability: Much like Lumine's being more perfect by gaining ones full abilities, appearance, and voice. However he must still hit a target with the copy shot first to obtain a more perfect transformation, and he must be transformed into another person in order to use that person's abilities to their fullest.
Standard Copy Ability: A much weaker transformation. He can use this without the copy shot, however this means he can only copy another person's appearance, voice, and their abilities to a far weaker extent.
Axl's firepower does not increase.
I plan on Axl waking up after Lumine leaves his body. Lumine after leaving Axl's body will enter his second form and fly off to the moon. Axl with his new powers will have Alia transport him to the moon to battle Lumine. A battle of the Copy Ability! On the moon! After that I plan on having Axl take temporary leave to go with Yuyuko to train in the Hakugyokurou with his new abilities? Until the Devourer Arc begins. Once that arc truly begins is when Axl makes a true return.