Tonight, I was visiting the ROBOTIS GIT Hub for more information on Dynamixel2Arduino, but then I found a new item just coming out about 24 hours ago regarding a new Arduino Controller named OpenRB-150, see screen captures below:
MCU wise, it looks like that it is equivalent to an Arduino MKR ZERO, however there is no need to use the MKR Shield 
. Also, there is a special sketch that can be run to make it function like a ālittle brotherā to the U2D2 (i.e., up to 1 Mbps only) so that the user can use Dynamixel Wizard 2.0 with it.
I think that it is going to be popular but donāt know when ROBOTIS is going to release it though.