FORGET hypothetitcal POTENTIAL.
CHILD franklin's FEATS uptil NOW{not the future but these are FACTS, that have ALREADY happened in comics}
onslaught with his power took out most of earth's heroes single handedly{including thor, jugernaut} he could also create a second SUN{btw isnt superman prime's power comprised entirely to a single STAR?}
after the onslaught saga child franklin created a pocket universe which rebirthed all the killed heroes and nurture them on an earth parallel to our own including heores like thor
has attracted galactus and eternity's interest in the past
RESURRECTED galactus with valeria after galactus's death{contrary to perception his powers were not burned out but returned later}
has been called the ultimate achievement of the celestials who created mutants to begin with and has been said to be as powerful as a celestial by the celestials themselves
due to innocence TURNED himself into galactus with all his powers and more for as long as no1 told him he wasnt galactus. in this form he started DEVOURING CELESTIALS.{hinting that he is FAR more even as a child than any celestial}
created multiple FULL SIZED universes unconciously as a child without breaking a sweat or even being BOTHERED and later travelled through them. he also created all the abstract concepts from scratch in these multiple universes
has lifted mlijnor without effort or odin's blessing.
oh n btw on top of him not having even control over his power yet let alone potential he had further mental blocks put in his brain to stop him from accessing much of his even lesser developed powers.
has awesome precognitive power.
speed blitxz HIM, my ASS.
n the going back in time n killing him agument is void as franklin can do that too very easily and he has omniversal level telepathy so hell know if even prime tried it n prime wont know what him cause hell be dead long before he even thinks.