The end of Miles Morales is near. Who is Miles Morales? He is the man under the mask of Spider-Man. Hold on, you say. Is not Peter Parker Spider-Man? We are talking about Marvel Comics Ultimate Universe and it has a different timeline. In the Ultimate-verse, Peter Parker was Spider-Man until his unfortunate passing. Miles Morales became the new Spider-Man right afterwards.
A lot of different things could happen in the world of comic books and “the end” could mean the series is just going to go into a different direction. Marvel does have to work hard at marketing its books or else no one would buy them. So, we have to forgive cryptic teasers like this one.