Fox-Chan
Harumph.
Oh, come on, you don't find it odd that after the 25th anniversery Series, Gaoranger, Toei made a Sentai that takes the "Ger" from ranger and put at the end of another word to try something new and that after that, the next three sentai's, Abaranger, Dekaranger and Magiranger, use the entire ranger word and it's 30th anniversery series was called Boukenger, then after it was Gekiranger, followed by Go-onger, Shinkenger and, soon, Goseiger? That seems like a pretty clear coincidental pattern to me.
No, not really. That's just Toei being 'creative' with the word Ranger and another word based on that particular team's gimmick. Again, this has been around since Goranger, although the word 'ranger' didn't get used in a title after Goranger again until Turboranger. It's not really a pattern, it's just whatever name pleases them or their typically unpleasable fanbase.
Personally, I prefer when they actually gave their series somewhat original titles. Even the titles with the 'man' suffix were better than their most recent titles.