^ You're right, there are two camps: (1) People who think this is going to be a huge hit and (2) people who are going to wish they were in the first camp six months from now.
This isn't going to be Orthanc or Red Five or Sea Cow. Once it is gone, it is going to BE gone. It isn't going to become available again every week or so for five months on Amazon (I'm looking at you, 10237). Lego wants this one done. TLG made the decision a month ago never to produce another Tumbler. What exists in the world is all that is out there. No more runs.
I'll tangle with anybody on this site who feels like having a go about this one, and here's my opening volley:
1) Shortest shelf life for an exclusive in recent memory.
2) It's an iconic vehicle and not a play set. Vehicle > Building > Play set (with some notable exceptions). If AA is your reason to steer clear of the Tumbler, you're wrong.
3) It's from the best Batman series that will probably ever be made. They're going to keep trying, but Nolan's trilogy will remain the king, at least in my lifetime. See #5 below.
4) Heath Ledger's Joker.
5) Batman is.... well, Batman. Whether he Begins, Returns, is Forever, Rises, or faces off against Superman, he is never going away. Ben Affleck is going to make people long for the Dark Knight Trilogy and the 76023.
Get them while you can. If you pass, you'll be sorry you missed this one.