Cung Le isn't experienced enough in my opinion with no ground game to fight with Frank Glamrock. Frank needs to step up the level of comp. to the level of his mouth, until then I just don't care to see or hear about him.
Which speaks even more to how badly Rampage would beat Frank. Rampage is bigger, a billion times better wrestler, and a billion and half times better striker than Renzo, and Renzo took Frank down at will. Rampage would pound Franks face in standing, and slam him through the mat.
Cung Le is still new at mma - but he has a lifetime of experience in San Shou at the highest level that sport had to offer. people are sleeping on Cung Le's stand up skills. This is the fight that will wake people up. While I don't necessarily see him defeating Frank - I do see him giving Shamrock enough trouble standing that Frank has to try to keep things on the ground until he can hook a submission.
I have always enjoyed his San Shou matchs but bottom line, he has no ground skills, Frank will sub him in the first.