Back around October saw Tom Holland state it was all up in the air regarding if he was going to appear in The Avengers: Infinity War, which was followed up by Kevin Feige stating they were figuring it out.
Now a possible list of actors for The Avengers: Infinity War has hit the net, which leaves out Spider-Man. A movie casting call website offers the following list of names:
Starring in “Avengers: Infinity War” is BAFTA Award nominee Chris Hemsworth as Thor, Academy Award nominee Josh Brolin as Thanos, Saturn Award Winner Chris Pratt as Star Lord / Peter Quill, Teen Choice Awards nominee Sebastian Stan as Bucky, four-time Golden Globe Award nominee Scarlett Johansson as Natasha Romanoff / Black Widow, Academy Award nominee Benedict Cumberbatch as Dr. Stephen Strange, Academy Award winner Brie Larson as Carol Danvers / Captain Marvel, ALMA Award winner Zoe Saldana as Gamora, Empire Award winner Karen Gillan as Nebula, two-time Academy Award nominee Jeremy Renner as Clint Barton / Hawkeye, two-time Saturn Award nominee Chris Evans as Steve Rogers / Captain America, BAFTA Awards nominee Elizabeth Olsen as Wanda Maximoff / Scarlet, four-time Academy Award nominee Bradley Cooper as Rocket Raccoon, Screen Actors Guild Awards nominee Vin Diesel as Groot, Academy Award nominee Samuel L. Jackson as Nick Fury, Screen Actors Guild Awards nominee Paul Rudd as Scott Lang / Ant-Man, British Independent Film Awards nominee Benedict Wong as Wong, Action on Film Award winner Dave Bautista as Drax, BAFTA Film Award nominee Paul Bettany as Vision, Santa Barbara International Film Festival Virtuoso Award winner Chadwick Boseman as T’Challa / Black Panther, three-time Academy Award nominee Mark Ruffalo as Bruce Banner / The Hulk, and two-time Academy Award nominee Robert Downey Jr. as Tony Stark / Iron Man.
Of course, it is possible that since Tom Holland hasn't been confirmed to appear in The Avengers: Infinfity War, that the website simply left his name out, as I believe all the above actors have confirmed appearances by either the writers or in various interviews.
However, perhaps there is just too many characters and Marvel Studios wants to hold back on Spider-Man for The Avengers 4? Evangelline Lilly revealed she won't be a part of The Avengers: Ininfity War, but will be a part of the fourth Avengers movie, so it's not like The Avengers: Infinity War will feature every Marvel character, plus it has to introduce Captain Marvel, so there's probably not much room for the newer characters.
The Avengers: Infinity War hits May 4, 2018 directed by Joe and Anthony Russo.
Tom Holland stars in Spider-Man: Homecoming, out July 7, 2017.