Could Ginga continue in any way after GDN?

[Troyo7]

I think they have already exhausted all the options for incredible enemies that the Oou army faces since in GDN they fought against giant dogs fused with worm aliens. Also in each series someone important dies leaving broken hearts.

[Troyo7]

They have already faced wolves and even aliens, the only thing they would be missing in their next manga are sorcerers and that they have the power to bring back fallen friends.