At least in the case of Kyle Reese, yes, thats a good point. That shouldn't present any restriction on announcing further T-800s though - Arnie and/or Endo.
It could though, since we don't know the terms of the deal with Arnold. For all we know, they could have reached a point where renegotiations are required. It's even possible that a new figure was ready but rejected for whatever reason, bringing them back to the drawing board. For endos, I can't imagine there being near as many potential hurdles.