I predict that the dragon type z move will be some variation of the fusion dance from dragon ball z, my source for this prediction is that
1) toriyama has been an inspiration for early art and some pokemon have been based on the dragonball franchise either by design or lore
2) "z" moves(straw grasp)
3) the dragon typing (another straw grasp)
It most likely won't be a direct copy but have a slight difference to make it shorter. If they did cut out a part for time it would probably be the first part where you get closer to your partner.