DQX Will NOT go to PSP.
Most of the software released on PSP doesn't sell as well as it potentially Could sell on another platform.
Only exception is the monster hunter series... DQ9 is going to DS because it has the largest userbase (by far) and still sells great. PSP is selling better a.t.m but it's total sales are WAY behind.
DQ10 will probably go to Wii! Why? Wii has a big potential userbase for this moment in it's lifetime. Aprox 6 million after 1.5 years on the market is really sweet! Add to that that every DQ title has been released on the console that has been doing the best (with the exception of 9, being released on a handheld, due to the fact that that period was a transition from 6th to 7th gen).
DQ 9 for DS and DQ 10 for Wii would be a saver guess. However, this is only so if we rule out moneyhats. Money can do a lot of strange things to developers... So you never know for sure! 
.
THE NETHERLANDS
