Please no, that horse is dead. Leave it alone. Make something new.

They should have made the Sarah Conner, part John Connor. Make him a crazed old hermit still waiting for Judgement Day that he's forever stopped. Now he's got to train Dani to be the savior that he never needed to be. Then you can get into how he spent his last 30 years not living, just prepping for a nightmare that won't happen.