Its tough to say. But definitely fun to think about.
If they take a page from other manufactures and look at what mods consumers are creating, we may see a Nero XL. In contrast, due to the fact many people wish to whine before research, the Nero does not yet have a "good" reputation IMO.
If the overall weight and potential speed is deemed to be the main culprit behind these complaints, it would be safe to assume Arrma would be quite hesitant to introduce and even bigger, heavier, faster Nero. Very sad thought for those of us who can bash our Neros with realistic expectations.
That would bring me to believe that a standard chassis, 1/5 scale would be the most logical step.
But, the one thing that stands out in my mind is Arrma's strive for speed. Going bigger, logically Arrma would have to make them faster simply because how they brand themselves. Doing this will increase breakage. Especially on RTR packages.
They could surprise us with more 1/10 scale, 1/8 scale drive train vehicles akin to the Senton.
Personally, I want kit versions.