Which weight division should expand? (Patreon)

I've started to think about the next round of new fighters for the WTFBA, with a focus on more of an international feel. Long term, I think I might do a world-cup style tournament next year, and I'd need to focus on adding the new fighters to one weight division to fill all the spots. So, I'm curious as to which weight division people would be more interested in seeing expanded first.