I don't think it would work with the Civic because the small battery and electric motor aren't enough to power it on their own, with the exception of low speed cruising for short periods. They would need to reengineer it with a smaller ICE and larger electric motor/battery pack similar to the Prius for this to be viable. Also an extra $2000 on top of the regular hybrid premium would be hard to swallow for most. Plugging in the existing Civic Hybrid would simply top off it's charge and provide little added benefit.