i see no problems here , they can easily use the new engine in multiple projects not only the next RGG game .
and also why would they wait more ?! they are still using the same engine for 5 years now ! the PS3 games is actually using a modified engine from the ps2 games , nothing major ...
Kenzan used a heavily modified version of the engine used for the first two games, but 3 used a new engine that 4 in turn used as well.
I just do not think SEGA is going to spend a significant larger amount on the Yakuza games until they get it to be a hit or at least a decent seller outside of Japan. It took awhile for Yakuza 3 to make any money back, it is not like they can afford to keep bumping up the production quality if it will remain in Japan, that is a really limited market compared to the rest of the world. The PSP is a no-brainer to me in this case. It would sell, be cost effective and the demand for it outside of Japan would not be as big as Yakuza 3 was and Yakuza 4 will be, so less angry fans.
Besides, this is supposedly a spinoff. Why would anyone want to bump up their tech a significant amount for a spinoff and not the main series?
i am pretty sure that i heard it in an interview that the development cycle for any sonic project is two years .
and as for 2011 they can release sonic 4 ep2 with some spin-off .
also the celebrating actually will kickoff this year , so no big deal .
Well the development cycle is not true because the actual release dates prove against this.
I still say a spinoff game is on the way as well, but I suppose a new DS release makes more sense.
The way I think Sonic the Hedgehog 4 will be released is:
Episode I in June
Episode II sometime in Fall 2010
Episode III in early 2011, probably February
Compilation disc with all episodes around Sonic's 20th