Cassano's situation is yet to be determined with absolute certainty, while Pato gas had injury issues the last couple of years. Tevez would arrive on loan, if at all, and only if he sets Milan on fire would be bought ... and he is one of the few, quality players available players out there who can give Milan the type of forward they lost with Cassano.
In a word, if Tevez is available on loan and could be bought for a decent amount, if he settles in well at milan, then why not?