Goku could escape by overpowering Broly. He might tap into his Super Saiyan forms, like going into Super Saiyan Blue or even Ultra Instinct if he's pushed far enough. His sheer power and fighting skills could allow him to break free from whatever restraints Broly has put on him.
Another way Goku could escape is by using his wits. He could trick Broly into making a mistake. For example, he might pretend to be weaker than he actually is, and when Broly lets his guard down, Goku makes his move. Goku is known for his quick thinking in battles, and this situation would be no different. He could also look for any weaknesses in Broly's lair or the place where he's being held captive and use them to his advantage.
Goku might also get some unexpected help. There could be a character who has a hidden agenda or a sense of justice that makes them want to free Goku. This could be a new character introduced in the fanfiction or even an old enemy who has had a change of heart. They could create a distraction or directly assist Goku in escaping from Broly's clutches. Or, Goku could find a way to communicate with his friends telepathically, and they could come up with a plan to rescue him.
Chapter 459, ", Cruiser Technology!", is the clearest early answer because it turns Gu Hang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with In no time, merely half a year later, Gu Hang was able to see on the... and follows through with Heroes in this aspect could also improve on their own, but very....
Chapter 488, ", A Fatal Game", is the clearest early answer because it turns Iron Fury Stone's situation into a concrete plot event. The chapter gives readers a real answer by opening on Ou Juren needs to deal with 'Iron Fury Stone', and Gu Hang thinks... and ending on However, dealing with the 'Iron Fury Stone' isn't about jumping....
Chapter 473, ", The Chieftain's End", is the clearest early answer because it turns Eastern Front's situation into a concrete plot event. Early on, Gu Hang led a third of the Alliance Fleet and caused mayhem for three.... By the end, These were his goals, and he never expected that the Eastern Front.... Inside the broader faction conflict storyline, the chapter closes with One side intended to retreat defensively, the other seized the chance to pursue and expand their victory.
Chapter 382, ", He Really Believed It!", is the clearest early answer because it turns Fatches's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Minnick had never contemplated seeking independence, but displaying a... and follows through with By purging a portion of the officers and intensifying propaganda....
Chapter 376, ", Century Navy", is the clearest early answer because it turns Century Navy's situation into a concrete plot event. The chapter turns that into something concrete by moving from The "Blackfish" class rapid patrol vessel is equipped with shield... to Estimates suggest that the real cost for the Alliance to produce.... What makes it stick is that the chapter closes with But a hundred years..., which gives Century Navy a stronger narrative position and pushes the power growth onward.
Chapter 394, ", The Choice of Flying Wing Star", is the clearest early answer because it turns Tianma Palace's situation into a concrete plot event. The setup is Although seemingly similar, after joining the Alliance, Hongjian Star..., but the pressure keeps building through But in reality, the landowners on Hongjian Star paid a hefty price..
Chapter 381, ", Reverse His Mother's!", is the clearest early answer because it turns Korolya's situation into a concrete plot event. It opens with As for Korolya, having a development level maintained at grade 1 is... and closes on According to estimates, all the population on the Fatchess Tri-Star,.... The key payoff is that the chapter closes with I was planning to say it owed 1k, but adding a thousand words doesn't seem right...
Chapter 469, ", Temir's Great Victory!", is the clearest early answer because it turns King Saru's situation into a concrete plot event. The setup is The one who helped Commander Matins kill King Saru, besides the..., but the pressure keeps building through At first, he led several Psychics that had been deployed, engaging in....
Chapter 446, ", Mutinous Star Warriors", is the clearest early answer because the buildup finally cashes out in a real clash. The chapter gives readers a real answer by opening on If it were only members of the Marine Corps, that would be one thing,... and ending on How could they possibly get the help of Interstellar Warriors?!. In story terms, the danger stops being abstract and the conflict around Mutinous Star Warriors becomes immediate, forcing the surrounding cast to react under pressure.
Chapter 391, ", Mr. Gu", is the clearest early answer because it turns Galaraldo's situation into a concrete plot event. The setup is Then what else is Tianma Star Sector?, but the pressure keeps building through Might as well call it Gu Hang Star Zone." One and a half months.... Once the chapter lands on But the Eastern Cosmos Domain is different., the chapter closes with He wouldn't have trouble securing his position. The foundation left by the old Chairman Wang would help him;