That's my fear as well. If Conte leaves they will go for Inzaghi. Because let's face it. Who could you get if Conte decides to leave and Allegri goes to Real?
Sarri? You would have to make many changes to fit his tactics and there's no money.
Spalletti?
Your only option is to go for coaches who have a similar style with Conte. There are only three realistic options. Gasperini, Inzaghi and Juric. Gasperini doesn't want to hear anything about Inter. Juric would be a huge gamble so that leaves only Simone Inzaghi.
I don't think they would consider any coach from abroad. Not that there are any great options.
Unlike last summer when we had a great plan B in Allegri, this time we desperately need to keep Conte because the alternatives are massive downgrades.