Unfortunately, there's tech reasons we can't do this.
A Hunt battle formation is only generated once you get to its prepare screen. Until that point, it's unknown what the enemy lineup would be.
To get a Minion warning on the Hunt GoTo, for example, would require generating every single battle, for every single region, for every single difficulty. This would be cause a lot of slow down as it would involve both sending and receiving data to and from the server, then populating the UI.
I ask if there's any possible way it can be done, but I doubt it, as its been mentioned a few times.