The economic situation has not been good in Costa Rica recently with CAP having the presidency since 2014 but not a majority in Parliament. The Inter-American Court of Human Rights on gay rights was the catalyst for Fabricio Alvarado's meteroric rise, but the population was already really frustrated with government corruption and fights with the legislature.
I have grave doubt that Fabrizio, a one-issue blank slate, will make it to the end. Though Carlos has an undeniable link to Solis and economic uncertainty in Costa Rica, I sense the establishment (and most of the public) would rather not have a Pentecostal singer take control of government.