I am totally fine with Jon operating as Superboy. But if he has to choose another I would rather it be flamebird.
superboy title/mantle is also crutch by that logic. Clark is the first superboy and conner came second. Now Jon is using it. Jon is a legacy hero for now. So by definition, he is using passed on mantle.As I said, continuity is fluid. Jon and Lor zod have not shown any rivalry, let alone enemity. They can change Lor zod back to Chris Kent. Besides nobody seems to care about this version of lorzod. It is not like he is some great villain. Chris Kent was atleast rememberable. So they can revert him back via timeline shinanigans. And have Clark and Lois remember their past.
It is just an idea.It is not like it is going to happen. I will be lucky if Jon survives this Run and aging up fiasco.