Well that is what I remember, but as I said I could be wrong, and is listed that way in this OC Register article from 2021 about the opening -
Avengers Campus debuts Friday, June 4 at the Anaheim theme park after a nearly year long delay due to the COVID-19 pandemic.
www.ocregister.com
"The first phase of the new land will open with a Spider-Man interactive dark ride, Doctor Strange magic show, Ant-Man and the Wasp restaurant and Marvel character meet-and-greets and rooftop stunt shows. A second phase will open at an unannounced date with an Avengers E-ticket attraction.
The existing Guardians of the Galaxy — Mission: Breakout! indoor drop tower ride will serve as the anchor for the new Avengers Campus."
But all that aside, if you think about it it makes sense to have the large tower, the literal weenie of the land, be the anchor.