Best SEGA IP/published series post Dreamcast?
Before you answer. SEGA has released quite a few new IPs post-DC. Now they have not internally developed all of these but this is purely about IP not who made it. Here are just some examples of series post Dreamcast from SEGA.
Alpha Protocol
Alien Isolation
Universe At War
Binary Domain
Sonic and SEGA All-Stars Racing
Bayonetta
Anarchy Reigns
Mario and Sonic Olympics
Rise of Nightmares
Binary Domain
Gunvalkyrie (technically)
Infinite Space
Madworld
Yakuza
Otogi
Valkyria Chronicles
VanQuish
Resonance of Fate
Probably more I'm missing but this is just a sample. Feel free to contribute and it doesn't have to be just 1.