There are two misconceptions in this question: that Sanjo put
Beet on hold, and that Sanjo has not done anything since the
hiatus. Firstly, Beet is on hold because of Inada's persistant
health problems, which prevent him from being able to work.
Secondly, since Beet went on hiatus in 2006, Sanjo has worked as a
writer on Digimon: Xros Wars, Kamen Rider W, and Kamen Rider
Fourze, the last of which is only just now drawing to a close.