Just wondering if any of you have been following the latest Supes storyline, where he is shown a Future that involved him being killed off fighting, but main thing that interested me was that it was shown that he was able to get powered up by absorbing energies from heat/pressure/rocks within the Core of the earth itself!(Quick story/villian used nanites to go into his body to try to kill him off, and Supes is also hurled through Earth itself, and remains lodged in its core for awhile, but than escapes back to surface, using the energies of molten core lava/rocks/heat/pressure to repower him back up to a degree!)

Is this an example of showing us that Supes can use other means to absorb power/energies, not just the Sun, or was this just bad example?