Sub: It should be translated within 6-8 months after the original movie release. But many people believe it will be released somewhere around the end of April (25th to be precise) or the beginning of May in 2013
Dub: Not much details on it. The only thing which I found is: because of the amount of work needed for the dub, it needs more time than the subbed version. The dub version could be released somewhere around 2014-2015
As for subtitles; There will undoubtedly be a couple of low quality speed sub groups that will release it within a week, though if you want a HQ and good sub, I'd reccommend waiting about a month for someone like GG to sub it
I am also trying to find the English Subbed version of Naruto: Road to Ninja. The Raw version (non subbed movie) has been released on several websites. Those don't look like they were uploaded via phones or cameras. Most likely the subbed version won't happen till April.