THIS is the most likely scenario. Pegula is a fanboy. he didn't buy the team to make money. If he had, Ruff would be in jeopardy.
Fact is, fanboy Terry did not buy the team expecting to have to fire one of his hockey idols. He probably expected that after throwing money at all the areas he's thrown money at, things would fall into place. So, he will probably never fire Ruff, but rather find a position a little further down the trough to spare Lindy and humiliation---as if being fired once in 16 years in the NHL is so humiliating.
Something like:
Lindy Ruff, VP in Charge of Hockey System Execution