For some reason I was thinking it was gonna be called Avengers Forever. Ooo, they could spell it Avengers 4ever!
Supposedly leaked toy art revealing new looks for some of the heroes. https://www.reddit.com/r/marvelstudios/comments/9n83rk/new_leaked_avengers_4_promotional_art/ Look very Trek like to me with the white and reds.
Speculation is that they're suits used to travel through the Quantum realm. They bare a resemblance to Hank Pyms suit in "Ant-Man and the Wasp" This must be what the CGI dots represent https://imgur.com/5uhKtD5.jpg
I'm wondering why Evans has dots though. That's clearly him in the Avengers 1 outfit so it's Cap of the past from 2012, not "Present Day" Cap.