Though, the two other lead actors - Keira Knightley and Orlando Bloom were decent and reasonably believable, their characters weren’t exactly interesting enough.
As the performer who can be bigger than life on screen, he wanted more. Which got him thinking.
His brain felt overheated, which gave him an inspiration for Captain Jack - to a degree, poor Captain Jack’s brain must have been fried!
How dare he turn Captain Jack into a “drunk” and “gay” clownish character. They were absolutely livid!
He wasn’t about to back down so easily. Thankfully, Disney eventually relented.