The Red Devils legend received his long-awaited clearance to start an MLS franchise in Miami on Monday, on the same day Jose Mourinho stated he wouldn't stand in Ibrahimovic's way if he wanted to leave Old Trafford.
Ibrahimovic has failed to hit the ground running with United after returning from a knee injury at the end of the year. Given he turns 37 this year, Beckham is convinced the Swede can prolong his career in America, just like he did when he left Real Madrid for LA Galaxy in 2007.
"It's hard to talk about a player who is part of a club I love but all players get linked, at some point, with other teams and Zlatan is such a world-class player," Beckham told Sky Sports News.
"If talented players like him come into this league, it can only add to the strength and success of what this league can achieve.
"It's something that changed me as a player, changed me as a person and gave me a challenge that I needed and I loved every minute of it.
"If Zlatan, or other players like that, come into the league, it can only add to level this league can get to."