Newsarama has a preview of the Kobra one-shot on their site. From the solicitation:

Who is Kobra? After his death, Kobra’s terrorist organization has been in disarray, with different factions and false leaders vying for control. Now a new figure has infiltrated the Kobra Cult and started systematically destroying its powerbase. But who is this new player? Is it the original Kobra reborn — or something far more sinister?

Read the entire preview here.