You can't exactly call Doom a game with crappy graphics. It was groundbreaking back when it was released (well, maybe not so much
groundbreaking, but come on, this was years ago).
And Flashing Snall is right--never, ever, ever call it "Doom 4". Ugh, I'm getting flashbacks of a few months ago, that guy with the Quake 5 project in WIP? Ugh. It didn't so much look bad, but seriously--never try and do someone elses work (aka--make new sequels). A remake is fine--and Rebirth is good (Resident Evil did great with that name, but I wouldn't suggest Remake, since "REmake" is the only thing that does that well, and I'd doubt you'd call it "DOmake").
But realise that taking on a job like that is huge, huge work. If you're going to make this public (which you undoubtedly are), be careful--everyone's a critic 'round here (and... well, everywhere).
Evil has a new name. Demo out now!