The URL itself suggests the announcement of a smart phone game, since the apps.sega-net.com domain is where Sega promotes games such as Puyopuyo!
Sega has launched a teaser website (presumably for a new smart phone game) and the imagery hints that time-travel may be the subject matter.
Combine all of this with the word “Repair” in the domain name, and I’m thinking Sega is teasing a new smart phone game that has something to do with repairing damaged time-lines.