The title explains it all. Here are some of the print counts from big tentpoles, including some non summer ones.

Shrek 2 - 9000
The Matrix: Reloaded – 8517
Harry Potter 2: COS – 8515
Harry Potter 1: SS – 8119
The Matrix: Revolutions – 8000+
Troy – 8000
Spiderman – 7500
Godzilla - 7363
Lord Of The Rings: ROTK - 7205
X-Men 2: X-Men United – 7200+
Lord Of The Rings: TTT – 6633
Terminator 3: Rise Of The Machines - ~6400
Jurassic Park 2: The Lost World – 6100
Star Wars 2: AOTC – 6100
Men In Black 2 – 6000+
Van Helsing – 6000+
The Hulk – 6000
Shrek 1 - 6000
Pearl Harbor - 6000
Austin Powers 3: Goldmember - ~5800
Planet Of The Apes – 5800
Lord Of The Rings: FOTR – 5711
Finding Nemo – 5695
2 Fast 2 Furious – 5500+
Star Wars 1: PM – 5500
Bruce Almighty – 5500
Scream 3 - 5500
Austin Powers 2: The Spy Who Shagged Me – 5000+
Scorpion King - 4900
The Passion Of The Christ - 4,643 (Wed) - 4,793 Fri
Deep Impact – 4600
Rush Hour 2 - 4500+
8 Mile - 4500

(I couldn't find the print counts for Spiderman 2 or Harry Potter 3, if anyone can, please post it here, thank you).

Personally, I think Revenge of the Sith can get at least 7000 (like Return of the King did), but can any of the others make the chart (I think Madascar could get a high print count as well).

Hmm, well personally I think that just plain old screen counts are a lot easier to predict since those are ones that we have much more widespread info for.