What exactly will the new marine corps special forces do?

run spec ops?

This what Marine Corps times posted on the unit:

"the unit will be trained to conduct special reconnaissance missions as well as rapid ,direct action, strikes to seize, recover or destroy designated personnel or materiel."

The Marine Corps doesn't have Special Forces, that is an asset only the Army has.

Leap tall buildings in a single bound?

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the marine special operations unit would operate with a special purpose.

To kill.

A new spec. ops will have to work hard to gain respect. They will probably do their jobs and go beyond the call of duty. They will stick to the rifle mans creed.
"My rifle with out me is useless, without my rifle I am useless. I must fire my rifle true. I must shoot him before me. I will..."

kill,destroy and protect lol the usual

Cryhavoc, before you would consider .. learn the difference between SF and SOF.