When the first few reports of the Galaxy Note 7 catching fire started coming in, Samsung looked into the matter and determined that there was a battery cell issue in the batteries it was sourcing from Samsung SDI. It decided to recall some 2.5 million units and send out fresh units with batteries from another supplier. That should have worked, but it didn't. Even replacement units started catching fire and it quickly became evident that something else was wrong. Samsung has since killed the Galaxy Note 7 but it's still working to find out what caused those fires in the first place.
Samsung's mobile chief D.J. Koh has already said that the company is going to find the cause at any cost but recent reports have suggested that the company remains clueless about it. The Wall Street Journal has published a new report today which basically rounds up everything that happened over at Samsung ever since the Galaxy Note 7 was announced in August and provides some context through information received from its sources. The report also mentioned an unnamed member of the Galaxy S8 development team who apparently told the scribe that Samsung executives have delayed the development of the Galaxy S8 by two weeks as even those engineers have been tasked with finding out what caused the Galaxy Note 7 to overheat and catch fire.
Whether or not this delay is going to force Samsung to push back the Galaxy S8 announcement early next year remains to be seen, the report doesn't raise any such possibility. The company hasn't given any such indication right now. New Galaxy S handsets are traditionally announced at the Mobile World Congress conference and a recent rumor suggests that the Galaxy S8 will indeed to unveiled at MWC 2017.