Hey man, I wish you would RP again, like make a new character. You could make a super detailed character again, one that would be unique to the Neo LC. By the way, you never said Nacule's age and he didn't seem very old, so he is still alive. Nacule will just be very old and look like Kami.
(1) Geti Goku would likely lose unless he goes into his Samsara State. As Rasetsu does not really explain the extent of his power, I am not sure to which form Geti Goku would be forced into, hence the Samsara state being my estimate.
(2) Not really sure though, I haven't been keeping up with new OC's that are being made.