Pure speculation. There is no way that WG will divert Gerald to Chester - Manchester commuter services!!I suspect the Cambrian and HOW have sucked up anything that the Welsh Govt will give before the new franchise in 2018. There won't be any Additional north to south trains and if some sources are to be believed Gerald will lose its first dinner and become the Manchester club train. The curve will be one for the new franchise.
What those poor souls will get is 4 / 5 Mk 2s with a 67 at each end, the lack of foresight in all this is unbelievable (disposing of the ex Gerald Mk 2s).