There are a great many idioms which don't make a whole lot of sense when you consider them for a few minutes - or even a few seconds, for that matter - but there's one as true as it is trite which goes: "you can never go home again".
This is not a literal comment on, say, a global health crisis restricting movement to the family home, nor a cautionary tale about a lost bus schedule, but a maxim which warns that the past is the past, and attempts to relive it will leave you feeling bereft.
It is, as you may already be acutely aware, not a phrase by which WWE lives. The company has spent the best part of two decades almost purposefully trying not to make new stars, to the point where it relies on selling nostalgia to a dangerous, unsustainable degree. The passage of time makes the past a better place in most of our memories; WWE continually remind their fans that the promotion's best days are behind them.
There's obviously a time limit on wheeling out the legends though, either through disinterest, infirmity, or death. So they do the next best thing: try to recreate the good times, with inferior ingredients.
It rarely works. Because you can never go Hogan again.