Also, Bruce was still free to make films on his own for other people in the US or elsewhere, just as Chow was free to produce films for Golden Harvest. There was no obligation to only make films together, or any obligation to involve Concord in any future films with other companies.
This all reminded me of the financial shenanigans following Bruce's death, and I went back to look it up in Tom Bleecker's book:
"Despite the unending denials, family and studio pleas, and threats of litigation, the suspicious death of Bruce Lee remained in the headlines. Upon inquiring into Bruce’s finances, The Star soon disclosed yet another allegation: when Lee died, he was virtually broke. According to The Star, most of his Concord stock holdings, in addition to his Kowloon Tong home, were in the name of his butler, Wu Ngan. Moreover, it was claimed that Bruce’s much heralded Rolls Royce had never been ordered. With Linda having again gone into seclusion, the press finally cornered Raymond Chow, who scoffed at the stories. “Bruce had enough money when he died,” Chow announced to the world. “He could well afford a Rolls Royce and a house among other things.” -- Unsettled Matters