"Second coming of English vtubing" is a reach since I can't see anything hitting the levels of early Myth, but Jewcorp really are making waves, and I could see how well they support EN2 (and their level of success) making or breaking the company in a big way.
It really comes down to how sustainable their model of funding literally everything up front is long-term, because Aviel mentioned in one of his newsletters that Idol isn't profitable. Since then he's confirmed they have seed investments too, but even then the marketing campaign for EN2 was huge. Fully-animated trailers don't come cheap, neither does paying every single streamer in existence to restream five hours' worth of debuts; and that's not to mention the miscellaneous stuff like sponsoring OffKai. It's not inherently wrong to spend seemingly above your means in the first few years, you usually have to spend money to make money, but I'm wondering how long he's expecting to wait for relatively small superchat, membership, and merch (do they even have merch? I can't find a link to a shop on their website) revenue streams to earn it back, and how many more huge recruitment and promotion drives he can tank before the financials become an actual concern.
The thing I think Idol can benefit most from is that the company has almost flawless optics. The only noticeable black marks are some of the inexperienced HE girls graduating early (and even then they seemed to leave on good terms), and the kerfuffle with that artist a couple of weeks ago (which seems to be mostly forgotten about already). The company culture has more of a general audience appeal than something like Phase, and we haven't seen any catty shit spill out into the open like with Kawaii or EIEN. If Nijisanji keep shooting themselves in the foot at the rate they have been I think Idol have the best shot at being the next second place in EN vtubing.