Then don't make them fight each other
I think Dissidia looks pretty cool. Any game that lets you make Sephiroth fight the Emperor from FF2 gets tons of cool points. It might almost be worth getting a PSP for Dissidia and Crisis Core.
I liked the first Crystal Chronicles, so I've been looking forward to a second one for a long time now. Is there any word on a console sequel? My Life as a King looks kind of...meh.