[sethrw2000@yahoo.com]
Surprisingly there have been some new combos to use with the XYZ-Dragon Cannon and I have yet to see one mentioned.
 
The first combo is with the XYZ-Dragon Cannon and 2 Night Assailants.
You need to have one Night Assailant in the grave and one in hand and the
XYZ-Dragon Cannon on the field. When Night Assailant is sent directly from
your hand to the grave for any reason it allows you to get 1 flip effect monster
from the grave to your hand. Just discard the one in hand for XYZ's effect and get the other one and keep doing it till your opponent has a clear field.
 
The second card is Return from the Different Dimension. Somehow get the three XYZ pieces out of play, either by summoning an XYZ right the first time or Soul Release or something. Then activate Return from the Different Dimension, pay half your life points, and then remove all three to summon an XYZ-Dragon Cannon.
 
Hope you enjoy
SethRW2000@yahoo.com