Shiny Dragapult VMAX, Shiny Cramorant V, Shiny Eldegoss V and Rose SR have been revealed from S4a Shiny Star V. These are both reprinted cards from Darkness Ablaze and Sword & Shield Base set in their shiny form.
This comes from a poster that has been posted on Twitter by neruu_pokeka. There is another Fighting type shiny card in there, I can't indentify it, maybe you can? I think it's Shiny Sirfetch'd from what I've been told so far.
We have created a preliminary page of the so far revealed shiny cards of Shiny Star V. Please check it out.