Will they though? How much can you kick the nostalgia buttons before they get worn out? I know what all this stuff references and I could barely care. Nostalgic cameos aren't the exciting kick they once were, they're just the baseline expectation for most movies of this scale, to the point where you have to put in as many references as possible (like...Clockwork Orange and the Maltese Falcon?) to even get a modicum of satisfaction.
Anyway, I'm probably just not the target audience for this anymore (old man grumble)