The world doesn't need another console. Sega never really brought anything new/well supported to the console table hardware wise so why would we want another next-gen clone of PS4/Xbone? It would cost them too much at a lot of risk.

That said they could start with revisiting some old IP's like Daytona, Streets of Rage, Shining Force etc. and then create something new.

I think it would be very risky for SEGA to put up a console against Sony or Microsoft right now, they are too strong. Consoles in Japan aren't doing as well as they could be doing either so that would be something to think about too.

If a SEGA console was announced i would buy it without a second thought but i don't think other people would do the same. The casuals aren't going to pick up a SEGA console over a Sony or Microsoft console sadly.

I think the best thing SEGA can do right now is gain the trust of the fans back (people like me :p) and make great games like they used to do. Take it one step at a time.