Is Open Weight tournament still possible?

With the resurrection of PRIDE imminent, i was wondering if O/W competition was still possible.

(i.e. when Royce entered the 2000 tournament).

Are there any restrictions in Japan now days?

I remember MinowaMan doing one a few years ago...but no idea how long since that happened.

I'd love to see ONE Championship hold openweight fights. Imagine the craziness of seeing a small guy soccer kick a larger opponent or vice versa. Phone Post 3.0