5 years on L1B ; H1B picked in lottery -- petition cap-exempt for further extensions

Hi Team,

One of my friends completed 5 years in US now and fortunately got h1B picked in lottery for 2016. He plans a clock reset by returning to India for one year.

Question : Can he use the same petition for cap-exempt (next 6 years) ?

I am doubtful w.r.t the labor getting approved for GC as he will have only one year to stay oon h1B (5 years on L1B completed). What is the best the option to continue in US ?