IGA was trying to recapture the "SoTN magic" for the better part of 10 years. SoTN is like a hit single, just one of those things that's good and it's difficult "remake" that if you will. LoS was a more calculated entry, so I think it would be easier for them to repeat that formula than Sotn's almost accidental status as a great game.
Every single one of IGA's Metroidvanias captured the essential SoTN magic, each in a subtly different way than the next -- that's, after all, what made them so great. And yet we all continue to crave for the proud successor of the Symphony, that inevitable masterpiece we seem to be inching ever so close to, but that we never seem to reach. Here's the truth: the modern "SoTN 2.0" can't simply be a formula remake, no matter how skillfully executed it is; it needs to carry all of Symphony's magic...
and more. We're still missing that quintessential spark of energy that will push us into Castlevania's next great era, that same essential force that ushered the series into the Metroidvania age.
Listen, fellow Dungeonites, and heed the prophecy of the all-potent Intersection:
If Castlevania is to seek greatness once more, it shall find it at the forsaken crossroads between its past and its future, where none can journey alone. It shall find redemption where one road ends, and where the next begins; there, it shall step across the mighty threshold through which none can tread alone. Mark my words: only when the lonely paths of time intersect shall Castlevania at last receive its holy inspiration.