Thanks to Eric for the following.
According to the main Spanish newspaper 'El País', the Spanish Lost promo is going to be aired for ABC in the US and Terry O'Quinn is going to dub it!
Source: elpais
Thanks to Logan for this link
http://blog.cuatro.com/perdidos/2009/12/terry-oquinn-doblar%C3%A1-la-promo-de-cuatro-para-la-abc.html