although i'd love if the sequel was green goblin -> death of spider-man/origin of Miles, with some of the story being shown as Miles follows it on television.
Won't happen, but a guy can dream.
NO! Peter shall NOT die! Miles needs his own movie, sure but I don't necessarily think that they'll kill Peter because Sony wants to milk these properties. In fact, I wouldn't be surprised if Sony came out with a: Miles Morales, the OTHER Spider-Man movie. Sony really only has the spider-properties to go off of and it wouldn't surprise me if they tried to just, thrust Miles and Venom with the Amazing Spider-Man.
Life has its own share of twists and turns. Pick friends who are willing to keep you on the roller coaster.