Plans to launch a spin-off show of hit NBC series HEROES have been shelved because of planned strikes by scriptwriters. It was hoped that Heroes: Origins would feature 30 episodes and be ready for transmission next year - but the looming strike by the Writers Guild of America means the project has been put on hold for the time being. reports, "NBC entertainment co-chairs Ben Silverman and Marc Graboff didn't want to move forward given the uncertainties of a possible WGA work stoppage. "But insiders cautioned that Heroes: Origins isn't completely dead and could very well be revived at a later date, perhaps as soon as next season."