Nope. All 3 go into an epic battle. My guess is the next episode. Somehow with the way time has been working this season (ahem, there is no time, apparently), someone from the suicide squad going into the north will have a raven or Bran will send a raven to Dany and when they are all trapped (we saw they are walking into the night king's army), Dany will come riding in on Drogon and the other two following as part to fuck up the White walker army and also to rescue them.
It is also confirmed Benjen is in this season. I am guessing it is this next episode.
Biggest issue with my prediction IMO is that I don't see how they will capture a Wight and be able to bring it back on a fucking dragon.
Regardless of dragons, next episode is guaranteed to be HUGE.
Edit: To further elaborate why I think all three dragons are in next episode, we see a ton of fire north of the wall in the trailers for this season. How else is all that fire gonna get there? Not from Beric's flaming sword.