Celtic and Rangers will never be offered the chance to play in the Epl, there was a time 10 to 15 years ago that there was a slight chance for the idea to be explored in depth, many said they would have to go into the lower leagues first and work their way up, this wasnt feasible to either club as too much revenue would have been lost, mainly money from European games, also fans behaviour while playing in England didnt help, Some Celtic fans misbehaved while playing friendlys and testimonials in England, and then there was the Rangers fans going nuts in Manchester after the UEFA cup final in 2008, these two things combined helped to scupper the idea of it, on top of that we have just seen what happened with the ESL idea, How is the idea of Celtic and Rangers going to play in England any different as they would be turning their backs on the SPL, the teams like Kilmarnock, Motherwell, St Mirren, etc depend on the gate money when the old firm visit, granted the SPL quality is diminishing season by season, less and less quality players there now, but both old firm teams will be staying where they are for the fore seeable future and remain big fish in a small pond, while trying to get decent runs in Europe each season, something that each of them, to their credit have done very well in recent years, dont forget both have played in a Euro final in the 2000's , but overall the chance has gone for them to leave Scotland for good, in my opinion.