Agree with all of the above. I'd just like to see more evidence of a Z version before I get my hopes up. If you look at the release dates off all previous games (I looked at NA releases since that's where I live), the longest gap between an original release and a third version was 24.5 months from RS release until Emerald came out. If there was a Z version, I would expect that it would have been at least announced by now, given that it will be 24 months since its release coming up in 9 months.
RB:
September 28th, 1998
Yellow:
October 1st, 1999
GS:
October 15, 2000
Crystal:
July 29, 2001
RS:
April 19, 2003
Emerald:
May 1, 2005
DP:
April 22, 2007
Platinum:
March 22, 2009
HGSS:
March 14, 2010
BW:
March 6, 2011
B2W2:
October 7, 2012
XY:
October 12, 2013
ORAS:
November 21, 2014