According to Ultimate Dolph, Lundgren will leave for China next week on January 10. We can hopefully expect some news on Li and his on set pictures hit the net soon.
Update: we know by now Jan 12, that production has moved to Hong Kong instead of mainland China. Lundgren is filming in New Orleans with the rest of the EX team right now and should arrive in Hong Kong around Sunday according to Chinese news sources. Filming is supposed to begin in Hong Kong sometime early next week.