The E1 premiered for over $2k, I dunno if the successor will premier at a similar price as the market is fairly saturated with feature-rich cams at decent pricing.
Rumors floating around about an improved E400 for the US(and the rest of the world) market, not sure what is included in improved, but I hope LiveView is part of it as well... Not sure how they'd go about it without completely changing the body. While I hope LiveView is included, I think Oly will stick to a different line of cameras for LiveView.
E-X Probodies
E-4XX Small bodies
E-3XX Poro-prism design & LiveView(remember, the E300 was SUPPOSED to have LiveView, but Oly couldn't perfect it in time)
E-5XX Budget bodies
I don't KNOW this as Oly's scheme of things, but I have a feeling thats 4 lines Oly will continue with...?