The DM characters aren't going to react to the GX ones at the gate since they are from a different time. I am more curious about what Aster is going to say to Zane at the gate because his reaction is probably gonna be brutal if Zane loses to him. XD
True. It would have been cooler if Yugi had said something different to Jaden, though. Everyone can also now challenge themselves at the gate, but there is no dialogue and it is kind of creepy.
They sadly fail to put many fun dialogues because they decided upon following "logic" in an in-series crossover game, so cross duel world dialogue only happens in duel screen and even then it's rare. Logic is the biggest enemy of fiction.