The big daddy of the MCU, Kevin Feige recently had an interview with Comicbook.com.

Amidst the regular Marvel buzz, Feige was asked the most important question:
Will Keanu Reeves ever be a part of the MCU?

To which Feige responded that he really wants the internet’s boyfriend to grace the MCU with his presence.
He told Comicbook.com:
We talk to him for almost every film we make. We talk to Keanu Reeves about. I don’t know when, if, or ever he’ll join the MCU, but we very much want to figure out the right way to do it.

Essentially, the studio is just waiting for the right role for Keanu to come and grab. And frankly, so is each of us.
If he does come on board, we’re just curious to know what role he’d play. But who are we kidding? We’d watch him do anything.
conceptual film with keanu as every member of the x-men https://t.co/Cd28QgVy69
— elizabeth bruenig (@ebruenig) June 19, 2019
bro #KeanuReeves for Adam Warlock in guardians of the galaxy 3@JamesGunn @MarvelStudios @Marvel @Guardians
— AzzaStorm (@GillWomble85) June 18, 2019
@prattprattpratt pic.twitter.com/3HmY1msg0n
Here me out: What if he's just "Keanu Reeves?"
— Bob Chipman (@the_moviebob) June 19, 2019
We've established the MCU is a separate universe from our own via the different Presidents, so maybe the Keanu Reeves of
Earth-199999 joined The Avengers? His powers are "being Keanu Reeves," which is already more than Hawkeye does https://t.co/ySXYk2WHOw
Just be a superhero already, Keanu. For us, you already are one.