Forget Huntelaar and Milito, Iaquinta is gonna be Trez's substitute.
I'm not so sure... I think Iaquinta was signed as Zalayeta's replacement, as due to the likelihood that Del Piero and Trezeguet would not both be available for the entire season.
I think they genuinely hoped to keep Trezeguet. Huntelaar, Milito, Bianchi, Quagliarella are now realistic options, since Trez's transfer fee ought to cover one of them at least.
Guys like Villa and Tevez might be a little out of reach though.