Most people will recognise Matt Smith as The Doctor from the BBC's Doctor Who. In his time as the 11th incarnation of everyone's favorite Time Lord, he showed a vast emotional range from whimsy and curiosity to anger and rage and every emotion in between. If he is given the opportunity, he could give Hal Jordan the depth of feeling that just wasn't present for the Ryan Reynolds character. Given that the film will not be released for another 5 years, that will give Matt some time not only to bulk up for the part, but to work on his American accent as well. The upcoming Terminator Genisys should give him some name recognition among non-Whovians, which may just give him an edge in securing the job.