It is not from a credible source i'm afraid but I have heard several other people saying the same so who knows
One thing that we're all thinking is that if Jet2 do get 767's they will go into long haul, honestly I don't think this is going to happen (for a while atleast) so I guess if they do get 767's then it will be high density AGP, ALC, PMI, SSH
etc etc this would prob be more realistic for Jet2, as getting a 767-200ER/300ER in suitable condition with the correct engines for long haul may be hard to find whereas there are loads of -200s sat in the deserts in the US which would be right up their street for short haul ops.