We have seen the camouflaged prototypes of Iriz-Based Persona 3 (Yes, if we include the Wira as the first Persona, since it was it’s export name), from Paultan.org:
It’s looks like it will have a slightly longer back and swooping roofline. The rear design are said to mimic the coming New Perdana that is based on the late Honda Accord platform.
Here’s my take on the Persona 3. Taking a bit of Kia Rio Sedan I frequently saw here, albeit with Bruneian plates.