If you believe that a billion dollar plus gross revenue corporation the size of Delta doesn't have loopholes to cancel this agreement, then I've got some ocean front property for sale in Arizona!
I've personally over the years seen pilots get flushed out of the hiring pool at majors, flow throughs cancelled to their respective major and pilots already hired brought back in for a second interview after sitting in a pool for a long time (FedEx).
The only contracts worth anything, are the CEO's contracts. Otherwise, it's not worth the paper it's printed on.
Believe what you want!