Sounds Like There's Going to Be a Lot of CGI Characters in AVENGERS: INFINITY WAR

According to Sean Gunn (Rocket Raccoon), there are going to be a lot of CGI characters in Avengers: Infinity War. Before you say, "well duh!" let me put this into perspective... there are going to be more CGI characters in Infinity War than there were in the Guardians of the Galaxy films and there was a whole hell of a lot of CGI craziness going on there. 

While talking about working on Infinity War, the actor explains that all the CGI characters involved are making it a challenge for him. He says:

"I can tell you that the process for Rocket has been very similar to the Guardians movies. If anything, it's even more painstaking, because there are even more CGI characters around. In Guardians 2, Baby Groot was there the whole time, but the rest of the time was mostly with other live actors. In Avengers, there are several other characters who are CGI enhanced that I've interacted with, which makes the process a little more deliberate."

The question is, who could all these CGI characters be? We've got Rocket, Groot, Thanos, Vision, and Hulk. But for the most part, the rest of the characters are live actors. Technically Josh Brolin (Thanos), Paul Bettany (Vision), and Mark Ruffalo (Hulk) would be live on the set as well as acting out their scenes, unless they will be added in during post-production. Regardless, what other characters could be showing up in Infinity War that would be full-on CGI characters?