Ethan didn't waste any time lingering around.
After warning them, he vanished and appeared in his own universe.
His universe didn't contain much mystery to him anymore, so he wanted to explore beyond the universe.
Besides, he had clones in every place he needed to be.
So there was no pressure. If there came an emergency someday, he would be easily able to come here.
Now he wanted to make Po stronger as much as he could. Po only needed parts to upgrade and he would not need much time to become powerful.
Ethan's target was to go to the Chaos City, then gather materials, and after that he would leave the Chaos Verse if there was nothing keeping him there.
He wanted to go to the grandest stage possible.
Ethan didn't teleport. He wasn't busy. He would cross the entire path by flying, and not flying by physical means but in a spaceship.
For that he would use the highest tier spaceship of this Chaos Verse, "Phantom."