I am not sure that this is good news. We need strong exchanges, well capitalized and with proven security practices.
If a new exchange gets hacked, it could lead to "Bitcoin is unsafe" warnings yet again.
I do not think that now news about the hacking of the stock exchange will be a big loss for the bitcoin community. The people's confidence in this cryptocurrency is already much higher than a few years ago. And the fact that there are new exchangers is very good news