At last report, the proposed deal between Sony Pictures and Marvel for "Spider-Man" to start appearing in the Marvel Cinematic Universe was officially being hammered out--Some say the deal is done--with an appearance in"Captain America: Civil War" potentially the earliest possibility we may see webhead cross paths with the MCU.
However talks apparently broke down and Sony is ready to go it alone....Maybe not...
says that the two studios tried again and have sorted out a deal in which the
character will make his debut in 2018’s "Avengers: Infinity War - Part I".
It has been suggested that by the time 'Infinity Way' rolls around, the 'Avengers' roster
will look quite different to the one we start off with in The Avengers: Age of Ultron.
Spider-Man, a would be recast and would essentially
fill a hole left by some of the vacated characters.