For curiosity's sake I looked up the Japanese sale data for AC games. Media Create-only:
[PS3] Assassin's Creed (Ubisoft) - 27, 895 / 69, 510
[PS3] Assassin's Creed Ubi the Best (Ubisoft) - 1528 / 75, 374
[PS3] Assassin's Creed II (Ubisoft) - 48, 748 / 114, 483
[PS3] Assassin's Creed II: Special Edition (Ubisoft) - 6900 / 59, 057
[PS3] Assassin's Creed: Brotherhood (Ubisoft) - 36, 098 / 78, 112
[PS3] Assassin's Creed: Revelations (Ubisoft) - 39, 947 / 56, 615
[360] Assassin's Creed (Ubisoft) - No data
[360] Assassin's Creed Platinum Collection (Ubisoft) - 1265 / 13, 460
[360] Assassin's Creed II (Ubisoft) - 24, 227 / 38, 997
[360] Assassin's Creed II: Special Edition Platinum Collection (Ubisoft) - 1593 / 6952
[360] Assassin's Creed: Brotherhood (Ubisoft) - 10, 312 / 21, 029
[360] Assassin's Creed: Revelations (Ubisoft) - 4907 / 11, 581
[PSP] Assassin's Creed: Bloodlines (Ubisoft) - 16, 640 / 44, 920
[PSP] Assassin's Creed: Bloodlines UBI the Best (Ubisoft) - 441 / 13, 594
Would be nice.
I'm actually curious about the length. AC portable games have generally been quite short.
I'm sure gameplay would be fine, but I guess expecting a similar length game to a console game is expecting a bit too much?
I believe they said 13-15 hours for story length.