I don't know for now. Maybe we'll find out closer to the event or when there's more information available from Tom Holland or the Comic Con organizers.
Yes, Tom Holland has an origin story. He hails from the UK. As a child, he was interested in performing. He participated in local dance and drama events. His family also supported his dreams. He got his first acting gigs in the UK theater scene. His skills and charm caught the attention of casting directors. Then came his big Hollywood break with the 'Spider - Man' movies. All these experiences from his childhood, his early training, and his initial acting jobs make up his origin story.