I'd love to see a groovebox like Korgs latest Electribe (not the sampler) but with all the good features from elektron and with much more modulation possibilities. More voices. Able to play samples. Does not have to be analog. Could be digital in order to have more voices, more mod possibilities and more fx types. An intern battery, a small keyboard like the A4, Size should be similar to an electribe. Wold pay 1k for something like that!
A digital powersynth like access virus ti2 but with the power of modern hardware! (Virus is almost 10 years old, and still one of the best digi. synths you can get) I would love to see what elektron would be able to do with modern hardware.
A wavetable synth. Granular synth ect. Just a form of sound sznthesis that we not already have. We all have probably enougth subtractiv hardware synths!