Comics Questions about Final Crisis

[Firaxan]

I've been reading the summaries for Final Crisis and I have to ask . . .how is superman's heat vision the only thing keeping her alive . . .that doesnt m ake sense to me . . is she chronically cold?

and does Batman RIP have anything to do with Batman's disappearance?

 

[04nbod]

I have no idea how heat vision could keep her alive.

Batman was abducted by granny It has nothing to do with RIP although RIP will set up batman's appearance in FC