The potentially angry bear has calmed himself considerably though some legal research that indicates that Silvio would really have to pull out all the stops to steal this one (not that him at least trying to do so is in anyway beyond the realm of possibility).
Interested parties can take a look at the Champions League rules
here.
Article 1.01 expressly says that no national federation may enter more than four clubs. Strike One for Milan.
Article 1.07 expressly says that any club that fails to meet the admission criteria (including as a result of being found guilty of corruption (like Porto) or not having obtained a domestic license (like CSKA Sofia)) “shall be replaced by the next best-placed club in the top domestic league championship of the same national association, provided it fulfills the admission criteria.”
Strikes Two and Three for the Rossoneri.
I hope they enjoy the UEFA Cup; it's a great competition.