It's fun to speculate.
Chapeck initially tried to mind in own business (TWDC) and stay out of the social justice fight over HB 1557, but was pressured to use TWDC to fight it and that resulted in the targeted removal of RCID by DeSantis.
In my opinion, both sides did wrong here.
Iger would have been against HB 1557 right from the start, there would be no flip flop. We can only speculate what he would have done.
Either leader could have said something like -
"Walt Disney World and Florida are partners and sometimes partners can disagree. Walt and his brother Roy did not agree on things but still worked together to grow TWDC. Although TWDC and Florida disagree on this bill, we will still work as partners to serve the state of Florida and the millions of guests that choose to vacation at WDW."