If you go to Geoff's webpage you can see there are a couple of siblings which look remarkedly different from each other even though the peristome looks very similar!. bumpy and cute.
It'd be very difficult to predict that the teeth of the N X predator would be larger than those of the hamata parent, since one of the parents has no teeth in the peristome, as is the case of truncata. The only chance one has to get something with larger teeth than the hamata parent, in my judgement is to cross
Hamata X villosa
Hamata X macrophylla
Hamata X edwardsiana
Or any other neps with large teeth. Please notice i said "a chance to get larger teeth". Dominance or codominance should prevail, hopefully.