They have had a new 3DS/2DS every year since the 3DS originally came out. So it's possible a new one will come out, however with the delay on the New 3DS for the states, I don't think we will see a new console until 2016. We might get an announcement of the next console on a Nintendo Direct or at E3, but I don't think we will see a brand new version for a while now.
I am enjoying the New 3DS with the extra buttons and the control stick. It's kinda nice for Smash but obviously isn't required at all.