In all fairness....NT has to stay remotely close to the source material as possibly they've already changed everything or 75% of the series...I can live with the characters change of looks, any new characters that weren't there before, making Eva an angel, changing up Dante's & Vergil's back-story drastically, making Vergil good (so it seems), an entirely different story, and making demons rule over mankind making what Sparda all for nought but f*cking up Sparda's legacy is where I draw the line.
The main thing that made DMC was Sparda and his events before the storyline...him defeating Mundus and sealing away the demon world and saving mankind and becoming a legend because of it set the standard for the story and Dante's character as well as Vergil's and probably Nero....he was literally the source material for the conception of all main antagonists in the series.
Mundus - his former right master and was betrayed by him now he wants revenge and is out to overthrow the world again but this time Sparda's son must stop him.
Argosax - demon god worshipped by the people of Dumary Island until Sparda sealed him away and Dante must prevent his return and finish what his father had started.
Arkham - a man who respected Sparda's power and wanted it so he can become like him.
Sanctus - the leader of an Order who worships him and adores him and all he really wants to is to really do what he thinks Sparda would've wanted and unite and free the world from chaos and have all of mankind acknowledge Sparda as the world's savoir like any Jesus/God fanatic would do too but he needed Sparda's power and legacy to do this and believes if he wants to achieve world peace he needs to have as much power as Sparda.
Its his legacy that defined the core values of DMC. Now if they erase all of that and just make him some powerful demon who rebelled against Mundus and died trying......I'm telling you the fans will flip out....what they did to Vergil, Dante, & other characters is easy to work with...Dante matures into the demon hunter we know as him, Vergil becomes power hungry or betrays Dante, and etc...all that they done now can work but messing with Sparda's legacy like that cannot be fixed...slightly alter it make some changes or threw in a few things...or remove some old stuff like the Dumary Island stuff or redo certain aspects about his legacy like how he sealed off the demon world or maybe edit it to the point that he only defeated Mundus but not completely seal away the demon world or work with Limbo and apply that someway with Sparda's legacy or something...ANYTHING but make Sparda's legacy be a guy who fought valiantly and lost...maybe they can still do that AFTER he became the legend he is recognized and explain why demons are running amok and why Sparda is gone and work with the concept of Limbo because I think everything about DmC pertaining to Sparda and his legacy should be as it is in DMC up til he sealed away the demon world.