The army will be forced to call in the elections after a few months. With 75% of the national vote, Shinawatra might install a puppet as the president and still run the country (from outside).
What? Who is going to force the Army to have elections? The red shirts will start a civil war? That would be playing into the hands of the army.
They did this last time and he did run the country from outside, his sister took power.
I would not expect elections for at least two years, or they will be elections to a body that has limited power, or most of the spots will be hand picked by the army.