I believe there is going to be a Spider-Man mini during Secret Wars that'll explore the status of some alt Spideys. It has already been implied that at least some are already dead. Spider-UK was seen dead on a cover of New Avengers, and the Capt Britain that is with the Illuminati has said he is the only living Captain Britain left.
There's a Spider-Verse mini due out featuring Spider-Ham, Spider-UK, Arana, Spider-Gwen, Spider-Man Noir and Spider-Man India that takes place during Secret Wars. Due to a snafu the preview art features Mayday instead of Anya but is had been confirmed that Spider-UK survived the Captain Britain purge due to being caught up in Spider-Verse!