The reality is that Bruce Lee back then vs a top guy right now, the probability is that Bruce Lee would lose. But, if BL was given time to train, he would reinvent himself again. With that being said, he'd have just as good a shot as anybody at being a champion. BL continued to reinvent himself, he never felt he knew enough. With that attitude and his physical endurance/strength, he could very well be a champ.
I fight because this world is a cold, cold place. I've been let down, stepped on, passed up, and fucked over. I fight because I know that in this world, the one person you can rely on is yourself: wives cheat, family abandons, and friends sell you out. When I'm in that cage, it's me versus the world. True, I might get beaten, but I won't be deceived. In the cage I find truth. It is only through truth that we can find ourselves.