A bit of disjointed disruption at the busiest time of year? Doesn't really sound plausible.
What I suggest is happening, is Ryanair having failed to grasp the seriousness of the situation, and the resolve of their cabin- and cockpit crews. They've publicly said they'll acknowledge unions, but not any union. Particularly, Ryanair doesn't seem to recognise any existing unions. Since then all they've done is give staff a song and a dance, trying to stall for as long as possible hoping it'll all go away.