I dont see what the issue is asking for a NA track, before detailed planning gets too far progressed, it makes sense to have the two conferences overlap or be as one as people have limited time they can attend if they are interested in NA tracks and follow on from the NA 2016 conference then that is a good out come.
Asking ensures
- the venue capacity allows for the extra set of rooms needed,
- it attracts people interested in NA issues who wouldnt attend Wikimania
- it allows people to attend both with minimal additional costs, including time off work
- its about doing proper due diligence
- if the answer is no NA track(s) can be included then they need to address alternatives
- its not a them and us type situation