- Is the new analog engine a modified Phatty or Voyager engine or completely new?
None of the above. It’s not completely new; it’s literally the Taurus I analog engine.
- Will the lovely Phatty Overdrive circuit be included?
See above; the signal path should be identical to a Taurus I.
- “Taurus I style” was one octave, Taurus II was 1.5 octave. Is the new Taurus 1 or 1.5 octaves? If 1.5, will it be similar in width to the Taurus II pedalboard?
Good question; I’ll try to clarify. There may be some miscommunication on this point.
- Velocity sensitive floor keys? How about aftertouch too for modulation?
Nice idea but if the Fatar pedal assembly doesn’t already have aftertouch, then we are out of luck. I think it has velocity but not AT.
- Foot control of volume and filter, similar to Taurus I? Program changing foot controlled?
Yes on the program changing, “I think so” on the volume and filter. Of course, a Multipedal would give foot control of any parameters you like… 
- Midi i/o? Foot trigger and midi in trigger simultaneously?
Yes, the plan is to have DIN and USB MIDI. I’m sure you could combine foot and MIDI triggering (as much as a monosynth lets you do any triggering “simultaneously” of course
)
- Is there a LFO controlled from aftertouch, velocity and the envelope?
Hmm… that would be a departure from the Taurus I. So, I dunno.
- CV outs for controlling Moogers and Minimoog D?
CV ins; no word about outs. Would be nice… might cost too much.
I’m going to have to go with “I don’t know” on this one.
SPECIAL BONUS ANSWER:
nobody asked, but the plan is for this Taurus to have an arpeggiator…