They should probably just reboot this series as an endless runner mobile game series. Makes the most sense game wise and financially for Sega I think.
The Sonic Boom and other games for Wii U seem to be just quick money grabs done for cheap to churn out. I'm guessing they have Sonic team working on another game(I don't see them doing anything else at this point), and the game will have amazing graphics, basically be an on rails experience and people will get suckered into the Sonic cycle once again.
Sonic Boom being successful mostly depends on the cartoon and toys really. It's already being hated on by most of the Sonic fans, so even if the gameplay is good, it wont be accepted by them because it strays too far from the Sonic formula.
If Sega were smart, or if this wasn't a cheap cash-in, they would have delayed it for a bit to make some Amiibo tie-ins. But hey, it's not like Amiibos are a guaranteed success either.







