That can also mean he created another one right after the first one bluff, but I won't bother talking about this because its no big feat
If you comparing Edo tobirama 2-3 clones, then you should know hashi could only create 7. And hashi said naruto's chakra pool comparable to him while naruto can make 1000s of clones?? 7 clones and 1000 clones are not comparable.
If you want to calculate their reserve base on # of clones. Kid konohamaru at age of six made one clone while tobirama made 2-3, so does that mean konohamaru reserve is 40% of tobirama?? Then without uzumaki genes, konohamaru has potential to surpass hashi easily
And for the movie, salada is the main character's rival. The mc's rival is stronger than mc, so there will be a story
But no where it stated salads is a genius, how much of a prodigy is bolt while being weaker than salad who is not genius??? OK let me assume salad is equal to bolt, how genius is bolt when salad is not genius at all?!
And there are more holes about what people believe base on the trailer, but I don't need to go further