Heck yeah, Toyama is one of the best in the business. I kinda hope his next horror game is a new IP, but if he opts for a new Siren game, I'd be down with that too. Supposedly someone said at Sony Japan (think it might have been the producer) that Gravity Rush 2 will be "the conclusion" and since Toyama keeps saying he wants to return to horror, I doubt it will be very long until we see him craft another horror game masterpiece. Can't wait for it.
Speaking of Shibata, I kind of want him to create a new IP after Fatal Frame V, whilst his work is always great, I also admire his work outside of that series too, I just beat Trapt for PS2 last night and saw it was another one of his games (Designer/Director) and it was phenomenally good. Since his work on creating the Deception games is just masterful and full of cool and new ideas (how many trap simulators are there out there, honestly? Not enough!) I'd like to see him take a crack at creating something new again, whether it be a new horror game (or even do a Toyama and do the opposite of what we expect out of him and create an imaginative, charming world) with a new innovative gameplay concept (if you look at his games, despite how "dark" or "gothic" they are, he always adds a fun/arcadey element to the gameplay like with Deception's traps and Fatal Frame's camera). Would just be a shame to see him keep making Fatal Frame forever when he's obviously really good at creating new stuff too. That being said, I cannot freaking wait for Project Zero V, out at the end of this month. Just thinking of how long it has been since 3...pretty much 10 years ago by this point.