Whoever's playing Professor X — the moral center of the team, and the casting that has to nail both quiet authority and real vulnerability for the whole ensemble to click. is leading so far with 50%.
Rogue going to Inde Navarrette — the "Obsession" breakout ($488M box office) landing this role instead of the widely-predicted Mystique is the biggest swing of the whole announcement. is second. On this few votes the split is still anyone's guess.
Everyone who has answered so far is voting from China.
The most recent vote came in 6 days ago.