Why English Football may introduce Scottish Clubs' to protect against a European Super League

There has been talk about Scottish teams, namely the old firm, joining the English game for some time. Suggestions for this have come in different guises but there are good reasons why it has not happened.
Scottish clubs have lacked a competitive edge against Premier League counter parts such as Hibernian vs Aston Villa and Rangers vs Liverpool in recent times.
This is a deep dive in to how the two league structures may be able to combine for the prosperity of the teams, leagues, fans and nations either side of the border and help solidify The EPL as the world's leading football championship.