Jean was never the Dark Phoenix.
A few notes...
1. The different Jean art is LABELED as work in progress.
2. Before the early 2000s, Jean Grey was never the Phoenix.
- Early 80s, Dark Phoenix Saga: Jean, going by the codename Phoenix, gets mind raped and transforms into Dark Phoenix, kills herself 2-3 issues later
- Late 80s, some issue of Fantastic Four: Jean is discovered alive (retcon). Turns out when she was near death after a mission, the Phoenix Force placed her in a cocoon to heal. It then masqueraded as Jean until it committed suicide.
- Jim Lee era/90s: Jean never was the Phoenix, but she did ditch the Jim Lee costume to wear the real Phoenix's Green version costume (which she had to sew up herself). But she still didn't have the Phoenix's power.
- It wasn't until the early 2000s that Jean really got the Phoenix powers, then Xorneto killed her.
So white eyes on 90s Jean Grey makes no sense since she had no direct Phoenix connection other than having the Phoenix use her identity at that point. A Dark Phoenix portrait on a Jim Lee Jean Grey is just inaccurate on every account. I wouldn't be surprised if we do get an alternate head though, even if it is an angry head.