Honestly, the whole reason I'm more doubtful than I was before E3 (was almost sure he would be revealed playable at E3), is actually because he wasn't talked at E3 which leaves me with this important question: WHEN WILL WE KNOW LIKE SERIOUSLY???
If it wasn't enough for E3, what events or moment will? Random potd would only be ok if hazard but playable? Even a smash direct would be less hype than E3 so when? Post release? I can't tell and I don't know any more because now, he's free to make us wait how long he wants if he didn't intended to show him at E3. He seriously could make us wait until the game is released because E3 was probably the most hype moment smash could get.
The point I'm trying to tell is that even if I'm still on the playable side, my evidences aren't solid as they were before. Sure, there's that weird behaviour and size but even then, they can go either way and both of them would makes sense to some extent. The point where I'm leaving towards playable is the suspicious demo and the how worthy the purpose would be. The fact that it was a really showed stage and that only 1 stage (wii fit trainer one) was revealed before (and wasn't showed that much) makes the fact that the stage isn't in the demo really suspicious. It's very clear for me that he's trying to hide information but I don't think that hiding him as a stage hazard wouldn't even worth to show the shadow in the direct. It's not even the kind of info I see getting hidden but I see the info of him being playable getting hidden.
The problem with that logic is it's even more subjective: there's really nothing that proves (if it was to hide info) why doing such things at E3. There's really nothing that suggest that (if hazard) he would be ready to show. Because just the fact that he wouldn't be ready would justify this. The change in the final destination form proves me that they are still changing stuff so... it's stil possible. There's even the possibility of not putting the stage to simply do what a demo should: give a sneak peak of the game therefore, making the build limited in contents. If it was because of the latter, this would make this evidence completely irrelevant and thus, leaving me even more in the dark (maybe I wouldn't even be able to tell what would make more sense for me towards his fate).
This is why I'm more doubtful because my opinion is based on an evidence that I can't know if it's relevant or not. So, it's not reliable and basically, I'm back to the start: "It can go either way".