Thanks for the translation.
I think I heard they said 'more classes will / might come in expansions".
If this is even mentioned it's either in rhykkers video at blizzcon or (most probably) Quint69. Or maybe I misunderstood. If not then during q&a at the panel. Can't seach for it now.
They don’t deny it in this interview. It was more in a sense : they didn’t say anything so we don’t know what they might be, how many there will be, often they will be released. I’m pretty sure I also read or heard somewhere that there will be new classes.