nah he's just sus at this pointZeno being so nonchalant about this makes sense in that he's seen many dragons and people die by now, but also... He's definitely bonded with this generation of them as much as the first gen, right? So him acting like this is strange. Is it time for the rest of the legend to come into play at last? You know, the stuff about swords and shields or whatever and the red king saving the kingdom or something (they pretty much never talk about the legend, so I legit don't remember how it goes.)
There's a theory that Zeno will be the main bad guy in the end and wants to end the cycle of dragons.It's funny when you think about it, but most of lands that were enemy of Kouka were better off waiting rather than immediately attacking Kouka. Kouka is severely split between those who are loyal to Soo-Won and his father as well as the princess and the dragons, they would've eventually implode upon themselves which would've left them greatly vulnerable to opposing forces.
With that said, I hope Hak and them don't waste too much time on these guys if possible. They have two raging dragons out there that they have to find and save. Also, I feel like Zeno isn't being honest and is actually hiding some vital info.