No, I’m not joking. The International Astronomical Union (IAU) is looking for suggestions on what to name the new planets they have discovered outside the Solar System… see here for details.
Now why do I think some famous planets from science fiction might end up on the list? For instance, Trantor might be around the second star to the right of Sirius?
However, given the real history of Vulcan, don’t expect a planet to be named that any time soon… real history was there was thought to be a planet inside the orbit of Mercury, only the errors in Mercury’s orbit turned out to be due to Einstein’s theory of relativity.