For now, what we do know is that D23 will be host to a pretty big event that celebrates The Simpsons (as well as others within Fox/Disney’s new corporate family) moving forward, not backward; upward, not forward; and always twirling, twirling, twirling towards their shared future.
Though seeing as Marvel’s position might change with this year’s show, there may not be as big of a studio pull-back from SDCC as initially thought.