Spoiler Thread: Avengers Infinity War

Has it been confirmed that these movies' plots are chronologically following Infinity? Or it it possible that they may be prequels to Infinity, or as other have mentioned, having another hero take the monikers? My initial reaction was the same as yours, that the ending wasn't permanent. But the more time passes, the more I think it is. Sure there will be another Guardians movie, but maybe it's a good story of an adventure our heroes were on before Infinity, or Rocket forms a whole new group of Guardians. Or we get introduced to an entirely new universal timeline, where our original heroes are still alive. And honestly, I would love to watch any of those movies. So I'm really not having any trouble reconciling the fact that there is another Spider-man movie in the works.
GotG can get away with that but we've seen almost all of (Tom Holland's) Spiderman and T'challa - there;s no actual time when there could be a prequel

seemingly antman and the wasp will (probably) hold the key to the way forward