I am sure we'll get a FOC Grimlock and it is highly likely it will be a DLX figure. If that was the case what would your expectations be?
I'll just be happy that they keep it faithful to whatever he looks like in game... Any Grimlock is better than none!
Deluxe would be fine if they can include that sword from the trailer. WFC Prime was awesome for a deluxe and Hasbro has shown that they can make some tall deluxes like Cyclonus or lockdown.
I'd like a voyager, because Grimlock needs a bigger figure that isn't a masterpiece (size wise, that is). But, any deluxe that looks anything like the in game character will do. Hasbro did a pretty good job with the War for Cybertron figures, so I have faith in them. Well, if they do two Autobot molds, and two Decepticon molds like last time, you could have those two and Grimlock.
Well, if you believe Shadow, then there are more FOC toys than there was WFC. He even told us of Starscream, Ironhide/Ratchet, and Grimlock. After that, Optimus and Megatron are givens, and probably the Seekers
I have doubts they'll do anything higher than a deluxe. But if it's a voyager that would be great, so it could at least be different from the classics one.