Honda is working on a new motor to replace the old J series motor, it will be chain driven vs current timing belt driven, with direct injection and iVTEC DOHC configuration with few diff engine sizes. V8 is in the works for the RL. Next generation TL should have over 320HP from a 3.5L DOHC iVTEC from what my engineering buddies tell me.

So I think Honda's relative inattention to the J-series V6 engines is probably a good sign that something all-new is in fact on the way. The trends and technologies right now are definitely favoring DOHC dual-VVT setups which gives independent control over intake and exhaust cams, and allows you to better optimize emissions control, fuel economy, and power. i-VTEC would be a given by definition, and direct injection vs the current port injection setups would be logical too. Using a DOHC setup allows you to clear out more space in the heads especially directly overhead of the cylinder which can make way for a center mounted spark plug and also center mounted fuel injectors.