This could happen if enought people show interest by saying in this thread that they would play in it. I think that atm there are 6-7 peoples who have done so. As for map pool i agree that it should be something like the default nexuiz duel maps + maybe 1-2-3 additionnal maps just for a little diversity. Honestly i hope that the coming of 2.5.2 will draw more attention over nexuiz and will stimulate people.
For the ruleset. from the different opinions i got, its pretty sure that guided rockets will be turned off as most dislike them in duel. Opinions about auto bunnyhopping (pogo )are still evaluated but it could go the same way.