I know it's hard to let go... but I think it's about time that we view the as what it is: a new IP with some familiar touches. nobody is going to buy this game because it screams smt or fe - it just doesn't.
Who are you responding to? I'm not one of the people who was upset by the game not matching the teaser. Look at my earlier post.
However, when we're talking about whether the game will be successful or not, you should appreciate the value of the crossover. A crossover takes established fanbases and creates a new product that appeals to both of them, hopefully introducing the audience of each to the other. It relies on people accepting the unfamiliar by seeking out the familiar.
Following that conversation. Why are Fire Emblem fans drawn to this crossover? Where is the similarity? It's not the gameplay, which is very much Shin Megami Tensei. It's also not the setting or the story, both of which are totally different from Fire Emblem. Maybe it's the characters, but those have very different designs and roles, so I'm not totally sure about that either.
Mainline Shin Megami Tensei fans are in a similar boat. They've got the gameplay, but not the setting, none of the characters so far, seemingly none of the story so far. Persona fans might have a much bigger connection - I don't know a ton about Persona - but that ultimately begs the question as to why Atlus shouldn't have just made a Persona game with these ideas and made use of that brand's popularity.
So I'm not getting upset that the game is different than it's expected to be, I just think that kills a lot of the benefit from crossover. It's not gaining the benefit from both brands the way that, Project X Zone is. And I think that game's total shit, by the way, it's just good at selling the crossover aspect.
Oh, and while I'm being a buzzkill. Developers wanting to make a game into a series does not really mean that the game will be made into a series. It's always possible that the game doesn't do well enough (in comparison to the other projects that the developer could be making) to justify more games being made. There are a million examples of games that developers have repeatedly stated that they want to make but have not been able to do so due to business concerns.
I mean, maybe I'm being overly pessimistic and the game will do great, I'd love it if that happened. But I don't see anything that suggests that otherwise and I'm really not feeling it.