That's because we aren't getting as many Riders and Forms as the previous two years. If you look back at Kabuto, Thebee stuff came out before the series started. Drake and Sasword pictures were released soon afterwards.
BANDAI expects a new form/rider to come out almost every month, especially in the first half of the year.
Anyways, the 30 episode rumors does have more validity than ever now, but I am still somewhat doubtful. Isn't TOEI trying to milk the 9 series and promote the new Ganbaride Game? I find it weird that they are willing to invest on 1 year worth of new material (which they have done for 9 years now) yet they will skip out for an anniversary show that's being highly publicized.
Not only that, if the rumors that a new Den-o series will succeed Decade, it makes it even more weird. Why would TOEI not even make Decade just to go back to milk Den-o again. It would make sense if Decade was an enormous failure during its run so they cut it short for Den-o, but to cut it short right when the show just start? Is Den-o that safe of an investment?
I still want a year worth of show, 48-50 episodes. It's only fitting to end ten years of Rider with 10 years, and like I said, not 9.5 years + Den-o x2.