Author notes.

I thought it was obviously implied, but I will explain it anyway.

The supreme god tried to seal him because he is afraid of what he can do if he reaches his full potential.

In god years he is a pup and defeated a god that is eons older than him.

The supreme god fears his potential, and therefore wanted to erase the threat to his position before it arises.

I also seem that you guys want longer chapters so I will go from 1000 to 1500

How about that? Good enough ? :p

He won't go to DXD is another world.