NVIDIA Shield OTG compatibility?

[[GBATemp]~IceStorm]

I am considering picking up a Nvidia Shield console and I was wondering what the Shield has in terms of USB OTG compatibility with controllers.

We have tested the following controllers and they are compatible with SHIELD in Console Mode:
Nyko PlayPad Pro
NOTE: may require update to latest firmware
MOGA Pro, MOGA Pro Power, and MOGA Hero Power
NOTE: MOGA controllers do not have an integrated Android Home button
XBOX 360 wired controller
NOTE: must connect wired USB controller to a separate micro USB to USB OTG Adapter

This was taken from the official NVIDIA Shield website. I wanted to plug in my official NES controller with a RetroLink NES to USB adapter that is connected to a USB OTG connecting cable. Would this work? I have tested it on a Nexus 7 and it works perfectly, so I assume that it would work on a Shield because they are both android devices. But you know what they say about assuming, it makes an "ass"out of "u" and "me" ( ASS-U-ME = assume).
Can someone help me with this? Also, can I connect other USB gamepads as well?

LINKS:

NES USB Adapter