According to Chrysler's new 5 year plan;

*The development of the 6.4 Hemi will continue

*Challenger gets refreshed for 2011 and continues at least through 2014

Which would seem to indicate that the Challenger...
will get the 6.4 Hemi at some point in the future (outside forces aside, such
as CAFE fuel standards, etc..)

(I just can't help but think about what they did to the front end of the 72-74
Challenger, let's hope they do better this time around) (sorry--just my opinion)