Situation- you push back from the gate when suddenly you get a message from dispatch and ATC, your destination airport is in a GS right now with 1/4 visability and fog. First flight of the day so the plane woke up covered in some ice and frost. As you sit on the ramp you get more news that the delay is expected to be updated within an hour but has a high possibility of extension. You now have a few options. You can go deice the plane but will need another round of fluids due to the lengthy delay on the ground in hopes that you can sit at the hold short line and be the first in the air once the stop is liftoff. Or you can pull back into the gate, offer egress, and wait out the delay. WWYD?