For the opposition, it will be tricky to run under the state of emergency conditions. Most public gatherings and rallies are severely restricted. Journalists are in jail. More than 90% of Turkey's print and visual media are under Erdogan's direct or indirect control. There's a huge budgetary advantage to Erdogan as he taps into the public purse.
Still, I don't want to be pessimistic. Although the playing field is not level, Turkey's opposition parties recently have demonstrated immense wisdom in coming together across the political spectrum and demonstrating that democracy is not a zero-sum game of destroying one another, but more about collaborating to develop a pluralistic democratic ecosystem.