Without any preparation or protective ability, if one's true body fell directly into the universe, one would either be dragged into ruins by gravity or torn to pieces by the omnipresent terrifying radiation, extraterrestrial viruses, all kinds of strange magnetic fields, and so on. There was even a rather low-end way to die: suffocation.
With Sun Wukong's temperament of charging in hot-bloodedly without preparation, Vegeta figured the last possibility was more likely.
"Don't you have Instant Transmission? Just lock onto his energy signature and teleport over, then bring him back. You could fight on Earth, or take him to the Sacred World of the Kais or the Realm of the Gods of Destruction, couldn't you?"
A battle in the Starry Sky was impossible.
Sun Wukong was not as freakish as Gohan from another time and space, a being with no fatal weaknesses while undergoing all-around improvement.
With his strength, he would die the instant he rashly entered the Starry Sky.
Although Vegeta had never particularly liked Sun Wukong,
he would not stand by and watch Sun Wukong throw his life away because of foolish bravado.
Piccolo, Nobita Gohan, Bulma, and the others also spoke up to persuade him.
Sun Wukong's current strength was indeed so great that, with mortal power, he could rival Deities and even surpass them.
But in everyone's eyes, if he accepted Gohan's challenge to a battle in the Starry Sky,
they would probably have to gather the Dragon Balls to revive him by the next day!!
Chapter Sixty-Nine: Inviting Gohan to Participate in the Universe Tournament
Earth, Kami's Lookout.
Gohan returned once more with Frieza One.
He had no choice but to come back.
After all, Sun Wukong of this time and space was actually unable to truly cross the Starry Sky of the Universe and