Idiom
be ... in the making1. be a [athlete/star/writer etc.] in the making
if someone is an athlete, star, writer, etc. in the making, they are likely to develop into that thing.This young swimmer is an athlete in the making.
2. be a [crisis/disaster etc.] in the makingif something is a crisis, disaster, etc. in the making, it is likely to develop into that thing.What we're witnessing here is a disaster in the making.