Two that I know so far is Sega Superstars for the Eyetoy & Sega Splash Golf featuring the likes of Sonic, NiGHTS, Bonanza Bros, and Sakura Shinguji.
Ah, fair enough then. Although SEGA were in a better position to change things around.
S0L's answered your question regarding the Japanese characters though...it seems that it'll be very unlikely on their part.
wait wait hold the phone. What madness is this? Isn't the IP owner just. . .Sega? Don't they own all of these franchises through and through? And what crazy guideline would prevent the use of items that come from franchises ALREADY represented in the game? I'm tired of reading crazy excuses as to why bad design decisions were made.
And as for the water, it doesn't look like the boats are cutting deeply enough into the surface. I'll wait for some HD gameplay footage before I dive into this issue though. Pun intended!
I do think it's strange that SEGA can't use each of their IPs for the items...but after reading how picky Sonic Team are with Sonic in general (it took 6 months to just get Sonic's vehicle done)...this doesn't surprise me.
As for the water section...it looks a hell of a lot more realistic then most water based racing games. As long as the vehicles control smoothly, I couldn't care less about how the boats rest on the surface.
No offence to you of course as I respect your opinion on the matter and I somewhat agree to what you are saying, but the physics in this game appears to be much more improved over ASR.
I found the trick system to be pretty hard in the game however...it's set on the right analogue stick...so there's more freedom in doing tricks you want to do...but knowing when to do them and what direction to do them in can be pretty hard when you are racing, boosting and using items as well as pulling off tricks.
I am also unsure how flipping upwards/downwards works for the flying sections...it seems to me that you lose a lot of speed doing them because you want to...but the boat section seems to be really good at these stunts (I managed to do one back flip and two front flips in a very quick succession...so it's very responsive at the least!)
The boat sections to me were actually very exciting to play! Too bad the sections in the game so far to be much more shorter then the air or road sections. (I took into consideration PD's second lap and SMB's water section...but they felt like they only lasted a minute at most due to how short those sections were vs flying).
I guess providing us a small section would make us appreciate it more!
My only concern of this game is how spaced out everyone is during the flying segments (I felt like most of the racers were too far away to hit)...and given that the items shoot straight ahead and the mines expand...there's a lot of space to avoid these items really easily.
The boosting however was really good...and doing it for too long kind of stalls the controls, lol.