I'm convinced it'll be Arteta, which I think would be a pretty bold move, and for having that element of risk I'm far more enthused and interested than I would be if we signed a known like Allegri.
Arteta's spent a couple of years surrounded by the current best, and he's spent enough time at Arsenal to have a knowledge of who / what is worth holding on to and also what needs to change, based on what he's observed over the last two years.
Roll the dice I say.