[[Category:Hikonin Sentai Akibaranger]] became visible at the top of the page (the pages I was looking at then were the three Akibarangers). What it should do is add the hero to a category matching the season name, though that is kinda redundant as the Article Headers do the same thing.
It is, as the title states, merely a second season. It's as different as MMPR seasons 1 and 2, which have their own pages but also only have Mighty Morphin in the RangerInfo infobox. So in the infobox, the season 2 listing is only needed if they're exclusive to season 2. The headers identify which characters are in only season 1 and which are in both anyway. We ought to make a combined header, come to think of it.