Nobody knows what tomorrow holds and there are no guarantees in life never mind flying training.
Saying that, the airline industry is making up for lost years in terms of recruitment. There was 911, Afghanistan, Iraq, 2008 economic recession and as a result there was very little recruitment. Now that the airlines are expanding and have the cash they are recruiting a lot more.
However, one airline that recruited constantly through the recession was Ryanair, they ran pilot assessments weekly and still do to this day. At the minute they are training 800 cadets a year, something which will increase as they have a/c orders on their books up until 2024 and are aiming to have 1000 a/c by 2030. I would hesitate to say that there is a looming pilot shortage, but the LCCs are big beasts that need fed and will certainly create a lot more pilot positions than would have been available a few years/decades ago.