Nero was never in prison, that was a deleted scene. Just like Martin Madden is not the first officer of the Enterprise-E and Saavik is not half-Romulan.
I love this kind of logic. It's basically saying that absolutely NOTHING HAPPENS. Nero and his crew repair their ship, and wander around in space drinking their own urine waiting for Spock. That shot of Nero laying on his klingon table? According to Garm, he's been like that for 25 years. Seriously, Nero has been laying down on that table non-stop for 25 years.
This logic involving non-canon issues never happening is just stupid. Take Countdown for instance. In the movie, Nero says he watched his home planet get destroyed. In Countdown, Nero watches his home planet get destroyed. However, because Countdown isn't canon, that never happens. So, if Nero didn't see his planet get destroyed, his character in the movie is lying. If he's lying, why does he constantly shout and yell that he did? Oh, in countdown, Nero also had a wife. Since Countdown isn't canon, Nero is AGAIN lying that he had a wife. If Nero never had a wife, why is he so angry about something that he never had?
Ya, anything that is officially endorsed by the studios that own the franchise, bears the trademark logo, is written by real writers and is as fictitious and sometimes contradicting as the real series itself, it shouldn't be taken seriously. It's almost like spending money on an education, spend a few years there, graduate, but when you're done everyone says that it didn't count simply because......it doesn't. It was a real education program, endorsed by everything that makes Education important, is taught by real paid teachers, but because it presents itself differently than other schools, it doesn't count.
This Canon debate sucks. Sure, Gene stated that everything on film should be considered canon and everything else shouldn't be, but who in their right mind would want to spend their money and waste their time on something when they're told it's totally pointless? And for that matter, who would want to waste their good talent and good time writing stories for someone else's universe when they're told it won't happen no matter how much research they do to make it work?
In conclusion, no one should have the right to say that what you pay for that's both official and endorsed doesn't count, because it's all fake like the real series, and sometimes it's a lot better.