What was surprising with the "Dekaranger 10 years after" announcement was mostly ... how late it came, especially since Toei managed to get easily the cast back when they launched the Blue Ray
Dekaranger was pretty much a very likely choice as a "V cinema 10 years after" for several reasons :
- Dekaranger is one of the most popular sentai shows of all time, in the long term ( in fact, it's its popularity which made it one of the first "delusion sentai powers" used in Akibaranger), and it's telling that among later Power Rangers shows, PR SPD was one if the first which was dubbed
- It has a cast which is very active, and very involved, one has just to look how many of them came back in Gokaiger, how they were involved in the PR SPD Japanese dub, and their involvement in the release of the Blue Ray
- because of its police theme, making a stand alone movie is very easy : Dekaranger has a pretty much open ending.
Abaranger being skipped for a V cinema special is also undestandable :
- First issue, Abareyellow's actress has retired
- Abaranger was very popular when it aired, notably with its very popular opening song, but now, it is mostly seen as "that dino themed sentai between Zyuranger and Kyoryuger", and as such, it pretty much had its "Ten Years after" movie with the Kyoryuger vs Go-Busters movie (and frankly, storyline wise, Hurri 10 years after wasn't much more interesting than the Abaranger elements of the Kyoryu vs Go-Busters)
- Other problems with the casting : Abaranger relied on child actors (Maya Banno and Kasumi Suzuki) who can't really take again their former roles now, notably Suzuki, and frankly, with the death of Sugishita's actor, an Abaranger without Suke san would be lacking.
- and last, I don't think that Toei would be able to make a relevant Aba V cinema, given how the Abaranger tributes of Gokaiger weren't very well done (both Mikoto and Emiri weren't consistent compared to what they were in Aba)