Infinity War 1 and 2, Black Panther, Captain Marvel, Antman and Wasp, Spiderman 2, Guardians 3... That is at least 7. There is more than 5 left. at least 3 or 4 more we don't know about yet.
I was talking about 5 left through the end of Avengers 4, at which point we know they'll be some major changes to team compositions going forward. Feige has said they have 20 more films planned post Avengers 4, but that will mark a major turning point/finale for many characters.
Maybe a few characters, but I can't see the changes being that huge. After all, the MCU is just racking in money at this point, and if it ain't broke, don't fix it.
Plus who knows how those talks between Disney and Fox are going to go.