they dont always need reasons to make a reboot, other than they (the creators) are tired of the current character, felt theyce made one too many mistakes and want to take it in a different direction. or start again use what theyve created the first time round and inprove it. heres a prime example:
you have classic batman (not adam west classic) now he got pretty serious from time to time. and he was pretty cool. but in the end the creator at DC felt that it just wasnt going right. sales were fine, popularity in media was fine. but something about batman was off. so they decided to scrap their current batman and change it to a much darker and more psychological story. suddenly batman wasnt the perfect man.i mean he was a man who trained his whole life to fight crime and wears a bat costume in a world where people holding the country hostage is no surprise. so realistically he became a dark, brooding and slightly ill man who was driven by obsession. no more did he have the bat chopper, bat arrang, and bat shark repellent (LOL) but weapons designed to incapacate people and martial arts skill thatd make bruce lee back off . his costume was no longer funny. it was battle armour desgined to scare criminals. his enemies had changed even more. the joker TO THIS DAY is the worlds greatest villain. not some gravity/magical/planet eating monster. but a man with a knife, maybe a gun and a flower full of nerve gas. but if you said i could choose between glatactus and the joker. id pick the giant planet eater any day of the year.
i understand DmC is not as extreme as batman but you can see similarities. Dante was awesome.buuut the creators wanted freedom to explore routes they had rendered unusable thanx to what the did previously. eg mundus, real world setting, Vergil. so they went to NT. and NT said "look, if youre gonna do this you have to do this right" you want a real world setting for this. Dante is gonna have to look realistic. no body where full bright red trench coats. EVER ANYWHERE. dante grew up essentially under attack and persecuted. no way is he gonna be soo up beat and cheerful at least not at the start. and one thing lead to another until we have what we see thear. in my opinion an improved dante (at least from what i can gather from whats here)