What if they are humans from the future?
I've always thought this was pretty obviously the case
Encounter at farpoint has a number of things that hint at this idea.....If the Q know that humans are very powerful in the future (and we accept they can travel in time) then why travel back to ask these questions of humans....why not just ask the powerful humans of the future
Unless.....the Q are the humans of the future and are interested to know how they became Q....what is it about their ancestors that led to this
well, why not just go back and ask/interact with your ancestors
Perhaps the original direction that Gene wanted to go with TNG? Exploring the evolution of Human beings into god-like creatures. It makes sense...
Introduce Q in the pilot, make reference to the fact that Humans may one day surpass the Q.
Hint at Wesley being the next step of Human evolution in WNOHGB
. That would certainly fit in with the idea of him being a "Mary Sue" character "He's a god!".
Give Riker the option of fast-tracking evolution in Hide & Q
It was forgotten about a little until All Good Things
where Q made reference to the fact that the adventure lies within, not without.