The current movie has started production already, that's why. The rights won't go to the heirs until 2013, which is why WB rushed Man Of Steel into production so they could have the movie out before the end of 2012 and therefore not be blocked by the heirs.
To make it perfectly clear, the Siegel/Shuster heirs only own the things established about Superman in Action Comics #1. This means that they'll get the rights to his entire origin of Krypton (I'm not sure if this includes the Kents, but it involves the whole "dying scientists from Krypton sends his infant to earth" story), his alter-ego as Clark Kent, Lois Lane and the Daily Planet. Every element of Superman that was introduced after AC #1 remains DC property.
1. JLA#1 by Geoff Johns and Jim Lee
2. Action Comics #1 by Grant Morrison and Rags Morales
3. Superman #1 by George Pérez
4. Superboy #1 by Scott Lobdell and…
5. Batman #1 by Scott Snyder and Greg Capullo.
6. Detective Comics #1 by Tony Daniel
7. Batgirl #1 by Gail Simone, Ardian Syaf and Vicente Cifuentes.
8. Batwoman #1 by J.H. Williams III, Haden Blackman and Amy Reeder
9. Catwoman #1 by Judd Winick and Guillem March
10. Red Hood And The Outlaws #1 by Scott Lobdell and Kenneth Rocafort
11. Batwing #1 by Judd Winick and Ben Oliver
12. Nightwing #1 by Kyle Higgins and Eddy Barrows
13. Batman And Robin #1 by Peter Tomasi and Patrick Gleason
14. Adventure Comics DC Universe Presents #1 by Paul Jenkins and Bernard Chang
15. Green Lantern #1 by Geoff Johns, Doug Mahnke and Christian Alamy.
16. Green Lantern Corps #1 by Peter J. Tomasi, Fernando Pasarin and Scott Hanna
17. Green Lanterns: New Guardians #1 by Tony Bedard, Tyler Kirkham and Batt.
18. Red Lanterns #1 by Peter Milligan, Ed Benes and Rob Hunter.
19. Animal Man #1 by Jeff Lemire and…
20. Swamp Thing #1 by Scott Snyder and Yanick Paquette
21. Legion Lost #1 by … and Chris Batista?
22. Birds Of Prey #1 by Duane Swierczynski and Jesus Saiz
23. Teen Titans #1 by Fabian Nicieza Scott Lobdell, Brett Booth and Norm Rapmund
24. Savage Hawkman #1 by James Robinson Tony Daniel and Philip Tan
25. My Greatest Adventure #1 by Kevin Macguire and Aaron Lopresti (possibly for October)
26. Supergirl #1 by Brian Wood
27. Wonder Woman #1 by Brian Azzarello #1 and Cliff Chiang
28. Fury Of Firestorm #1 by Brian Clevinger Gail Simone, Ethan Van Sciver and Yildiray Cinar.
29. Aquaman #1 by Geoff Johns and Ivan Reis
30. Mr Terrific #1 by Eric Wallace and Roger Robinson
31. Flash #1 by Brian Buccellato and Francis Manapul
32. Green Arrow #1 by JT Krul and Dan Jurgens
33. Justice League International #1 by Dan Jurgens and Aaron Lopresti
34. Captain Atom #1 by JT Krul and Freddie Williams II
35. Grifter #1
36. Unnamed Legion book by … and Chris Batista?
37. OMAC #1 by Dan DiDio and Keith Giffen
38. Batman: The Dark Knight #1 by David Finch
39. Vigilante #1 by Darwyn Cooke?
40. Justice Society of America #1
41. Justice League Dark #1 by Peter Milligan and…
42. Demon Knights #1 by Paul Cornell and…
43. Frankenstein: Agent Of SHADE #1 by Jeff Lemire and…
That's the line up rumoured so far.
Judd Winick on Catwoman and Batwing? Interesting, just a shame he won't be on JLI after his awesome work on Generation Lost. Also, I don't get why Snyder and Daniel get switched for Batman and Detective Comics. My only guess is that Batman is the main book and needs to be actually well written, which is why they said 'Fuck you' to Daniel and got Snyder, but still...
For the rest it's great to see Morrison on Action Comics (if true) but I'm a bit surprised that Cornell, after his great Luthor arc on AC, won't be writing a big book. In fact, while the concept of Demon Knights sounds awesome, I hope he won't get 'shafted' too much.
Giffen on an OMAC book? I'm curious.
http://www.comicsbeat.com/2011/06/07...-by-august-31/Publishing | Heidi MacDonald reports that DC Comics Co-Publishers Dan DiDio and Jim Lee sent a memo to creators working on titles for the “New DCU” relaunch requiring them to have three issues completed by Aug. 31, “no exceptions.” “If that criterion cannot be met,” the memo states, “we’ve instructed Editorial to begin work at that time on material that will be able to meet the deadlines for the series.
Because movie rights work VERY VERY differently from comic book rights. Contrary to what Doom said though the heirs ain't getting squat. WB owns the rights to the films now if they don't move within the next 4 years the rights could be up for grabs and thus the heirs could get them. Since WB will have the movie out by next year then like Kryp said it automatically renews the rights for them for another decade then when they do a sequel a decade after that sequel etc.