The fact is, it will never happen. However, if it were to happen Celtic would become a top 6 team in a matter of years. With Celtic's worldwide fanbase of nine million fans they have one of the most global fanbases in the world. With a 60,000 capacity stadium, we would be able to charge around 50 pound for a matchday ticket, and we have 40k season ticket holders, with around 250 pound per season ticket. With clubs like United, City, Chelsea, Liverpool, and Arsenal showing up at Parkhead on a weekly basis we would once again fill our stadium every week. Currently, can we challenge with out current squad? No. Could we sign a player like Hazard if we were a Prem team? No. However, our global fanbase and stadium we would sit in financial hole right between City, United, Chelsea, Arsenal, Liverpool. We would have more money than the rest, but not as much as those 5. Hence why I said top 6 team.
Also, I just realized that no team in the Premiership has a season ticket as cheap as 250, Celtic would realistically be able to increase the price to around 450-500, and not see much or any drop in sales at all.
Currently, Celtic fans pine for competition and we simply aren't getting it. That's why on Champions League nights we always sell out, it's bound to be competitive.