SpaceCadetStill no Silver Surfer. Maybe they figure its just too early in the Infinity story for him to appear. They really need to get some stronger heroes to fight Thanos because everyone in this cast, except Thor, is a joke compared to Thanos.
I really hope that a few movies down the line when the story starts to take off, the Silver Surfer is brought into the movies. He has been fighting Thanos for a long time and if one of the few heroes that can stand up to him 1v1 without the gauntlet.
Marvel Studios doesn't have the character rights to the Silver Surfer as far as I'm aware. so it'll probably never happen until some deal is made with Fox like they did with Sony and Spider-Man.
May not be accurate, but just google imaged this up to show the general stuff: https://1.bp.blogspot.com/-1xbMzsfVdbw/WKxLnfly6wI/AAAAAAABA1U/NJdNplw8fvIiqh5QLMXlcAvmW1LkukBSwCLcB/s1600/marvel-rights-v4.png