ZSaberLink
Media Create Maven
I expect Japan to jump on quickly actually because I believe there's a wide understanding that the Switch represents the last best hope of saving the domestic market. I think we'll see some announcements at E3.
Normally you'd think so, but given the weird decisions companies make at times, I'm not so sure. I think the bigger driving factor will be if things sell well on it. First, more third parties need to try that.