Hi mate,
very much doubt there will be a 2011 spec, the car is still really quite new.
Durango are always thinking of new ideas and ways to move forward, but for now there really isnt much to improve on the current DEX410.
The only things i think you might see this year are potential upgrades, such as:
Big bore shocks
The new rear diff ring holder (aluminium)
Maybe a one way diff
This of course is just me guessing but i very much doubt there will be a brand new car out this year. The release of the 2wd and short course truck will be next on the agenda, before they start thinking of ways to improve the unimprovable DEX410!
Think your safe to order yourself another kit, then get the big bores as an upgrade when there released.
Craig