The quantum suits in Avengers: Endgame are a combination of Ant-Man, Tony Stark and the Guardian's tech. The design being inspired by Ant-Man, the nano tech being used from Tony Stark and
AVENGERS: ENDGAME (2019) Suit Up - TV Spot Trailer [HD] - YouTube
What Endgame's Original Time Suit Helmets Were Supposed To Look Like
Avengers: Endgame's Quantum Suits Were Almost Inspired By Guardians Of The Galaxy | Cinemablend
MCU - The Direct on Twitter: "An unused alternate design of a Quantum Realm helmet & suit for Scott Lang in ANT-MAN AND THE WASP: (via @andyparkart) https://t.co/AdqgeAcjAQ" / Twitter
Advanced Tech Suit | Marvel Cinematic Universe Wiki | Fandom