There is another post about Sega Saturn. I own both Saturn and Dreamcast, Dreamcast is still my most favorite Sega conole. In fact, I have to personally fly to Japan to get the machine when it was launched ( my Japanese friensld pre-ordered it, but still need to queue up the whole morning to get it for me).
I like Sega, too back that they are not in console business anymore, would love to have Sega back, maybe more active in the handheld game market!?
The chances that Sega is ever releasing a new console (even a handheld) are very slim. Their game division isn't doing very well. There was a project for the Dreamcast 2 (by fans) but it was scrapped: http://www.thedreamcastjunkyard.co.uk/2016/06/dreamcast-2-project-shuts-down.html
I am not hardcore enough, I didn't realize there was a fan blew Dreamcast 2 project. Too bad it is already terminated.