Spoilers are dodgy at the moment. The only sure thing we know is that, according to this pic, the king seems to be seriously wounded.
Spoilers go along the lines of the King whispering 'my name is Meruem'. Yupi and Pufu crying. Epic pic really.
Even though the titel of the chapter is 'Rebirth', I think it's metaphorical. Judging from the picture he might not even make it out of the underground base.
Edit:
I just read the raw and really one things come to mind:
What the fuck?
I'm not even going to try and explain it's weirdness without any translation. It was..wow..just wow..