How can the concept of Anicca be linked to Sunyata? Sunyata is more commonly used to explain Anatta, but how about Anicca?
See anattalakkhaṇasutta, anicca and dukkha are fully used to describe anatta, suññata.


  
  “Monks, are feelings permanent or impermanent?”
  
  
  “Venerable sir, they are impermanent.”
  
  “Those which are impermanent, are they unpleasant or pleasant?”
  
  “Venerable sir, they are unpleasant.”
  
  “Those which are impermanent, unpleasant, changing, are they suitable
  to be reflected, ‘They are mine, I am there, they are my self?’”
  
  “That is not so, venerable sir”


For the example explanation "If something is atta (autocrat, controllable), sāra (real core, like wood core), asuññata (real existent forever)":


It must can control itself to live permanent,
It must can control suffering to be far away from itself forever,
It must can live at the same time/same place/same status forever
(real core must be permanent stable, real asuññata must never
disappear anyway), etc.


However, the fact is nothing can act like that. Every aggregate arising and vanishing depending (paṭiccasamuppānna, saṅkhata) on many variant causes (paṭiccasamuppada), so they are impermanant, and unpleasant. And by that no ability to control anything even itself, therefore aggregate is anatta.

Even nibbāna can not control anything, too. So nibbāna is anattā, also. But it is not anicca and not dukkha, because nibbāna not depending on any causes (asaṅkhata). So, nibbāna is not anicca and not dukkha, too.