In study detail we already show a list of up to 5 "Studies in which potential subjects have participated".
This is an idea to also display a list of up to 5 "Studies which will recruit similar subjects at the same time". The goal here is to warn study managers if there might be recruitment bottlenecks.
The number that is shown along with those studies is a bit abstract. It is something like "the expected number of subjects they will recruit from our pool". It is calculated as other.min_subjects_required / other_pool_size * intersection_size.