I don't see big publishers letting their games be up for a vote. They'd want to be 100% certain about their inclusion in the lineup.
I'm not sure why any developer would want their game to be voted on unless they were sure they were going to win. The whole thing seems crazy to me. It seems like a lot of people will assume that the losing games are just future PS Plus games and will avoid purchasing them for that reason. If the discount pricing for loser games is going to be very significant, then maybe it makes a little more sense.