I'm actually coming around to Grand Zi-O's design. But sure, thanks, "he's just literally touching himself to summon other Riders". Way to ruin it for me. I was all ready tired of people making dirty jokes at the expense of Kiva's Zanvat Sword, now I have to get even more of it here. Can we please just not? He's summoning Riders similar to how DiEnd does it; doesn't that count for something?
As for the episode itself, if no one saw the movie Heisei Generations Forever, you're fine. If you DID see it, then just remember that Sougo never actually got the Den-O Ride Watch in that movie, and that's why he's getting it now.
Usually, I can look at the interior of the Den-Liner to explain which version of Den-O we are looking at. If it matches the interior from the show, we are looking at the original Den-O. If we are seeing a different interior, like the one from Decade, it's probably some alternate/parallel version of Den-O. And even though they all ready clarified that these are the original Den-O characters from the show, if there's any inconsistencies with Den-Liner's interior design... Well, they did say it needed repairs, so I guess a remodel isn't completely out of the question. (And if anyone ask where the Owner or anyone else; they're probably in another car.)
Personally, I was fine with them pointing out Kiriya and Sakurai's actor being the same person. It's all in good fun. If we can't have fun with ourselves, then what are we suppose to do, be boring the whole time? Somehow, I actually found the Den-O Imagin a bit more tolerable this time around. Not completely, but I'm not ripping my hair out, so that's a good sign. In fact, I found Ryutaros possessing Zi-O's uncle the funniest scene in the whole episode. He's clearly too old to dance like a youngster, but he's trying anyways! And then seeing him have fun on the Den-Bird? How can you not love something like that? It's like this show has made him a kid again.
I do want to see how this story plays out. I'm not sure how that Imagin lashing out at Takuya is suppose to "help" him. I get the feeling that this animosity between Takuya and Yukihiro is all a big misunderstanding, and when they see things play out in the past, Takuya will realize that he misunderstood the situation or something like that. And since I'm finding things to criticize... I don't like how Trinity Form somehow wasn't enough to defeat the Another Rider. I know it's a two-parter, but it still downgrades Trinity's power. And I find it odd how Sougo got his upgrade for Grand Zi-O. It's like, we really didn't need to get all the watches after all? Just needed enough of them, and Den-O's too, and that's enough to get your golden form? Okay. It's random and odd, but sure, if that's what you want to do. Why am I suddenly hearing the Super Mario 1-Up jingle?