Until we hear otherwise from FT there's no reason to assume anything is legit.
dalianj has been active at TFW as recently as today so he's bound to comment on the situation sooner or later.
In any case, it's just a drawing at this stage, it's nowhere near production so there's ample time to change it to something that actually looks like a FT design.
Unlike Hasbro and Takara they tend to listen to their customers, they don't bury their heads in the sand and pretend they don't exist
either way,Fan Toys has already said they are making Grimlock and I'm buying it
The picture proves that Sever was drawn the same (style) way so it could be a leak drawing of Grinder