My take is that the alliance was definitely a failure. Whatever Nintendo paid for the game exclusivity did not pan out for additional sales on both the 3DS and the Wii U nor did it not spell the end of bad Sonic games. We do not know what resources were utilized by SEGA but the games appeared to be rushed at best and overall underwhelming. The game were exclusive so there was really no pressure to be overtly technical (1080p etc), was an opportunity for Sonic to shine but fell flat on its face.
It's hard to see what these last twoish year will bring to the future of Sonic, hopefully SEGA continues to work at it and it comes to a multitude of consoles.







