Though many people believed that for a long time that WWE only looked for a certain look or build for a wrestler or diva. For years it seemed like WWE only signed talent that qualified as models or bodybuilders much like a certain NXT diva or Chris Masters.
At this point WWE is looking for various new faces to tour with NXT next year and though Vince has always been against signing talent from ROH & TNA for the Main Roster. The reason for this hatred is because Vince doesn't like signing talent that has had exposure on National TV previous. Though that idea seems dumb that all has to do with wanting to make his own talent from the ground up with nobody helping him.
However, this reason they'd fit in NXT is because Vince doesn't mind setting those talents much like Samoa Joe & James Storm to NXT. The reason being is that work rate matters a tremendous amount more in NXT then on the main roster these days. The question is who will be chosen to come into NXT next year?