I think he will point out that thank god there were almost none cake references. I remember just one, on the doors which were glados trap for you.
He hates sequels , but he hates bad sequels. He loved Half Life 2 for example. He said that good sequel is that which takes formula and experiment with it. Portal 2 is not excelent but hell he did some things great. It created new mechanics for puzzles, it created very dynamic action and story. Co-op was great idea. Game tried to vary it's enviorment. And acting was great. It was good kind of sequel. Still had some flaws, it wasn't perfect.
I think he will like this game, and he will bash it with love, just as he did with Batman:AA.
So lets wait and see